Summoning 313 of the Surveyors Spirit Level

Lore: Within the broader, perilous art of Summoning and Binding, there exists a highly practical and foundational discipline known as Summoning 313. Its practitioners are not concerned with demons or otherworldly beasts, but with the humble, non-sentient spirits of Saṃsāra itself. Adherents to this path, often found in city planning commissions and civil engineering guilds, believe that the world has an innate desire for order, and that a true, level line or a perfect right angle is a physical prayer to the world’s geometric soul. They teach that to build a bridge that lasts for centuries, one must first ask the ground its preference for where the foundations should lie.

The Surveyor’s Spirit-Level is the first and most fundamental tool issued to an apprentice of this discipline. Each of these masterwork tools has been crafted with a minor “geometer-spirit” already summoned and bound within its core. These are simple earth-spirits, whose entire existence is a singular, joyful purpose: to perceive and align with perfect, true level. They are not conscious entities one can converse with, but are more akin to living, spiritual gyroscopes. The spirit-level allows the user to tap into this innate sense, transforming the complex art of surveying and foundational engineering into an intuitive conversation between the builder and the world itself.

Description: At a glance, this tool resembles a high-quality, two-foot-long spirit level. Its body is crafted from a single, straight piece of dark, polished ironwood, dense and heavy in the hand. The ends are capped with precisely machined brass fittings that protect it from damage. In the center of the wooden body, where a bubble and vial would normally be, is a sealed cylindrical tube of flawless, clear quartz.

Suspended within this quartz prison is the bound geometer-spirit, which appears as a single, untethered mote of silvery, liquid light. This mote is preternaturally responsive to gravity. When the level is laid upon a perfectly flat and level surface, the mote of light hovers motionlessly in the exact center of the crystal tube. If the tool is tilted even a fraction of a degree, the light-mote will silently and instantly drift toward the higher end. The brass fittings are etched with fine measurement lines, and the wood itself bears subtle, decorative carvings of interlocking geometric shapes, symbolizing the fusion of methodical engineering and cooperative magic.

Detailed Stats

Tier: 1
Intellect: +1
Focus: +1

Passive Magic

Geometer’s Truth: The spirit bound within the level is not subject to the imperfections of fluid dynamics or manufacturing tolerances. Its perception of true horizontal and vertical is absolute. When used to level a surface or check for plumb, it provides a perfect, unerring reading with no margin for error, allowing for a degree of precision in construction that is impossible with mundane tools.
Resonant Survey: When the level is placed firmly on the ground or a large structure, the geometer-spirit within resonates with the material beneath it. The user, holding the tool, can feel this resonance as a faint, tactile hum. The pitch and intensity of this vibration change based on the density and stability of the material. A low, steady hum indicates solid bedrock; loose soil or gravel produces a higher-pitched, rattling buzz; and a hidden cavity or void beneath the surface is felt as a sudden, unnerving silence in the feedback.

Activable Magic

Line of Sight: By holding the level up and looking through the quartz crystal like a spyglass, the user can speak a command word. The spirit within projects a thin, faint line of silvery light that extends outwards from the level, perfectly parallel to the ground, for a distance of approximately one hundred feet. This allows the user to easily and accurately mark multiple distant points that are all on the same horizontal plane, essential for laying foundations or planning aqueducts. This ability can be used once every ten minutes.
The Measured Yard: The user can place the level on a surface and give it a second command. The spirit will project a straight, silver line of light from one end of the level, extending outwards to a length of exactly one standard yard before terminating. This allows for rapid and perfectly accurate short-distance measurements without the need for a physical measuring tape. The spirit can perform this task multiple times, but each use is a minor drain on its energy. After a dozen uses, the light will begin to fade, indicating the spirit needs an hour of rest (simple inactivity) to restore its strength.

Specific Slot: Tool Slot

Tags: Summoning, Tool Slot, Common, Tier 1, Magic, Utility, Engineering, Civil, Intellect, Construction, Surveying, Spirit, Bound, Measurement, Geomancy, Light, Non-Combat, Guidance, Focus

In the industrious world of Saṃsāra, where cities float on the ocean and skyscrapers pierce the roofs of massive caverns, the tools of civil engineering are as vital as any sword or spellbook. The Surveyor’s Spirit-Level, a product of the specialized Summoning 313 discipline, is a cornerstone of this trade. Its sale and acquisition are handled not in common markets, but through the professional channels of the world’s builders, architects, and engineers.

The Guild of Surveyors and Architects

The most direct and formal way to acquire a Spirit-Level is through a registered professional guild. These are not storefronts, but grand halls in major cities that serve as the headquarters and libraries for the world’s most esteemed civil engineers. The walls are covered not with tapestries, but with massive, intricate blueprints of famous bridges, geological surveys of entire island nations, and cross-sections of floating metropolises. The air smells of old paper, drafting ink, and intellectual rigor.

Here, the Spirit-Level is not sold to the public. It is a tool of the trade, issued to newly certified surveyors or sold to licensed member-firms. The transaction is a formal process, recorded in the guild’s ledgers to maintain a chain of custody and ensure the tools are only used by qualified professionals. The focus is on upholding the highest standards of the profession, not on profit. To acquire one, an avatar would need to present their credentials and prove their standing within the engineering community.

Cost: A standardized price of 5 Silver coins. This price is set by the guild’s board, is non-negotiable, and ensures that all professionals start with the same high-quality, reliable instrument.

High-End Architectural Suppliers

In the most affluent districts of Saṃsāra’s capital cities, one can find suppliers that cater exclusively to elite architectural firms and city planning commissions. These establishments are clean, well-lit, and incredibly organized, offering the finest and most advanced tools of the trade. They sell massive, magically-treated vellum for durable blueprints, alchemical additives that strengthen concrete, and precision drafting instruments crafted by master artisans.

The Surveyor’s Spirit-Level would be found here as a prestige item, displayed in a protected case on a velvet stand. It is sold as an essential tool for any project that demands absolute perfection. The clientele of these shops are master architects and municipal planners who understand that the success of a billion-soul skyscraper begins with a single, perfectly level foundation line. The sale is a high-end retail experience, complete with knowledgeable staff who can explain the tool’s function and spiritual origins.

Cost: 1 Gold coin. The premium price reflects the quality of the establishment, the wealthy clientele, and the absolute necessity of such a precise tool for large-scale, high-stakes projects.

Frontier Project & Contractor Depots

At the edge of a newly developing region—the site of a new trans-oceanic bridge, a massive sea wall to protect a coastal city, or the foundational platform of a new floating city—a sprawling, practical, and often muddy supply depot will be established. This is the logistical heart of the operation, supplying everything from raw steel and lumber to the tools needed by the thousands of workers and contractors on site.

The Spirit-Level is stocked here as an essential piece of equipment. It is not treated as a mystical object, but as a rugged and reliable tool, racked alongside heavy hammers and spools of cable. A crew’s foreman or the project’s lead surveyor would acquire one from the depot by signing for it in a thick ledger, the cost being billed to their contracting company or the project’s overarching budget. The transaction is entirely logistical, focused on getting the right tool to the right hands to keep the project on schedule.

Cost: 6 Silver coins. The price includes a modest markup for the convenience of having such a specialized tool available in a remote, frontier environment.

Estate Sales & Professional Auctions

When a renowned master engineer or a celebrated architect passes away or retires after a long career, their personal tools, instruments, and library are often sold by their estate. These sales are quiet, respectful events, advertised through guild circulars and attended by former colleagues, aspiring apprentices, and rival firms. It is a chance to acquire the very tools that built famous landmarks.

In this context, the Surveyor’s Spirit-Level is more than just a tool; it is a piece of history. It would be sold as “the level used by Master Elara to lay out the Undercity’s Grand Promenade.” The sale might be a quiet affair or a competitive auction where its provenance can significantly increase its value. The transaction is one of legacy, with young engineers vying to own a piece of their hero’s heritage.

Cost: The value is determined by auction. A standard, used Spirit-Level might sell for 4 Silver coins. However, if the tool belonged to a famous figure, the bidding between nostalgic professionals or rival companies could easily drive the price to 8 Silver coins or higher.

The Surveyor’s Spirit-Level is a tool of creation and order, and its use in conflict is a testament to the adage that the smart warrior wins their battle before it is ever fought. Its roleplaying application in offense and defense is one of profound environmental awareness, subtle sabotage, and the intellectual dismantling of an opponent’s position, whether that position is a physical battlement or a professional reputation.

In an Industrial Alleyway

This environment is a vertical maze of scaffolding, rusting infrastructure, and unstable ground, where the environment itself can be a weapon or a trap.

Defense: Pursued by a street gang, an avatar wearing the Spirit-Level on their belt ducks into a maze of old, creaking maintenance scaffolding. Their only escape route is up. The main ramp looks warped and water-damaged. While their companions hesitate, the avatar pulls out the level and places it on the ramp’s central support beam. The Resonance Survey passive gives off a high-pitched, rattling hum in their hand—the tactile “sound” of severe rot and structural instability. Knowing the ramp is a deathtrap, the avatar finds a sturdy-looking steam pipe instead. Using the Perfect Level function, they see it has a slight but safe upward angle, and they lead their party to safety by climbing it instead of trusting the treacherous wood.

Offense: After being cornered in a dead-end courtyard, the avatar faces down several armed thugs. Direct combat is suicide. The avatar’s attention is drawn to the uneven cobblestones beneath their enemies’ feet. They kneel, pretending to tie their boot, and discreetly place the Spirit-Level on the ground. The Resonance Survey hums steadily, then goes completely silent over one particular section—a hidden, hollow space. It’s an old, forgotten sewer conduit. The avatar stands, points at the sky, and shouts, “Look out!” When the thugs are distracted for a split second, the avatar’s heavily-armed companion brings a warhammer down on the weak spot the avatar indicated. The ground shatters, plunging the unprepared thugs into the darkness below.

On an Airship Deck During a Storm

The chaos of a magical storm threatens to tear the ship apart. The integrity of the ship is the only defense, and exploiting that chaos is the only offense.

Defense: A massive gust of wind sends the airship into a violent roll, and the port-side lift-engine begins to sputter and shriek. The crew fears it will tear loose from its mountings. The avatar rushes to the engine housing, placing the Spirit-Level against the main struts. The Perfect Level function shows that the engine is now listing at a dangerous three-degree angle relative to the deck. Using the Line of Sight ability, the avatar projects a perfectly level silver line from a secure winch on the main mast to a specific structural point on the engine housing. “Here!” they shout over the wind, “Attach the emergency cable to this point, at this exact level, to counteract the shear stress!” The crew, given this precise guidance, is able to stabilize the engine, preventing a catastrophic failure.

Offense: Enemy sky-pirates have boarded and are taking cover behind a large, but poorly secured, stack of cargo crates. The avatar, lying prone, places their Spirit-Level on the pitching deck. They watch the mote of light in the level sway back and forth, learning the rhythm of the ship’s roll. They use Line of Sight to project a glowing horizontal line in the air that marks the apex of the ship’s next starboard roll. “Wait for my signal!” they command their allies. As the ship begins to roll and the deck tilts towards that glowing line, they scream “Now!” An ally cuts the ropes securing the crates, and because the angle is perfect, the immense weight of the cargo slides across the deck, smashing into the pirates’ cover and sweeping them away.

In a Monster-Infested Cave

Here, the ground beneath one’s feet is the greatest unknown, and the environment is filled with natural dangers to be avoided or exploited.

Defense: The Spirit-Level is the party’s most crucial tool for survival. As they navigate a wide cavern, the avatar keeps the level in hand, constantly taking readings with Resonance Survey. The tool’s steady hum suddenly becomes a faint, rattling vibration. The avatar halts the party, stamping their foot. The resulting sound is hollow. They have found a thin cavern floor, a natural pitfall trap over a deeper chasm. Later, while searching for a place to rest, the survey reveals a sudden silence behind a seemingly solid rock wall, indicating a large, hidden cavity. This warns the party of a potential monster lair, and they choose a more solid, defensible position to make camp.

Offense: A massive, heavily armored subterranean creature with a drill-like horn blocks the only path forward. Its carapace is too thick for the party’s weapons. The avatar looks up. The ceiling is a dense forest of stalactites. They spend a precious minute scanning the ceiling with Resonance Survey. Over one specific area directly above the creature, they feel a different vibration—the “buzz” of fractured, unstable rock. Using Line of Sight, they project a glowing silver dot onto that precise spot on the ceiling. The party’s archer uses the glowing dot as a target, firing several arrows into the weak point. The impacts trigger a localized rockfall, burying the creature under tons of stone and clearing the path without the need for a single melee attack.

At a Formal Gala for a New Skyscraper Opening

In this environment of social intrigue, offense and defense are not about physical violence, but about reputation, intellect, and subtle sabotage.

Defense: The avatar attends a party hosted by a rival engineer. Knowing their rival cuts corners, the avatar expresses admiration for the grand, floor-to-ceiling crystalline glass panels that offer a view of the city. Casually leaning against one, they discreetly press their Spirit-Level against it. The Resonance Survey gives a clear, steady hum… until they reach the central panel. Here, the hum is replaced by a faint, almost imperceptible high-frequency “scream.” They have discovered a microscopic stress fracture in the panel, a disaster waiting to happen. They quietly alert their own security contact, who arranges for the area to be cleared under a believable pretext, saving lives and cementing their rival’s reputation for shoddy work.

Offense: The avatar’s rival is about to give a grand presentation of their next project: a revolutionary new bridge design, the model of which is sitting on the stage. Before the presentation, the avatar gets a moment alone with the large, intricate model. They pull out their Spirit-Level. Using the One Yard True function, they take a series of rapid, precise measurements of the model’s suspension cable anchor points. They discover a tiny but critical flaw: the anchor points are not spaced symmetrically. The error is less than a millimeter on the model, but on the real bridge, it would be a fatal design flaw. During the Q&A after the presentation, the avatar asks a devastatingly specific question: “An impressive design, but can you explain the reasoning for the 2.8-meter asymmetry in the west-pylon anchor placements?” The rival, who has no idea what they are talking about, is left speechless and humiliated in front of their investors.

Perception of Activation:

The Surveyor’s Spirit-Level has two primary active abilities, “Line of Sight” and “One Yard True.” Both involve the projection of a line of light, and their activation is perceived in a similar manner, differing only in the scale and duration of the effect.

Activation: Projecting a Line of True Light

This describes the sensory phenomena when the user commands the bound spirit to project a line of light for measurement or alignment.

Sight

User’s Perspective: Upon speaking the command word, the mote of silvery, liquid light suspended inside the quartz tube flares, becoming intensely bright for a split second. It then focuses and projects a thin, unwavering beam of soft, silvery-white light from one end of the tool. The line is not dazzling or blinding; it has a solid, ethereal quality, like a single strand of spider silk illuminated by moonlight. For the “Line of Sight” ability, this beam extends far into the distance, remaining perfectly straight. For “One Yard True,” it is a short, sharp beam that terminates at a precise, clearly defined point.
Observer’s Perspective: An observer sees the user hold up the handsome wooden tool and speak a word. A bright silver light within the tool’s central crystal flashes, and a ghostly line of silver light emanates from its end. The effect is clearly magical but possesses an air of precision and elegance rather than raw power. It looks less like a spell and more like a sophisticated, luminous measuring instrument being deployed.
Positives: The visual effect is clear and unambiguous, making it an excellent tool for communication and coordination with a work crew or party. Its non-threatening appearance is unlikely to be mistaken for an attack.
Negatives: The projected line is an obvious beacon, instantly giving away your position and activity to anyone in the area. It immediately broadcasts that you are using a magical surveying tool, eliminating any chance of stealth.

Sound

User’s Perspective: At the exact moment of activation, you hear a single, pure, high-pitched ping sound. It seems to emanate directly from the quartz crystal and resonates for a moment before fading. It is a clean, harmonic note, like a tiny silver bell being struck once.
Observer’s Perspective: The activation is nearly silent. An observer standing very close in a quiet environment might hear the same faint, resonant ping. From any significant distance or in a noisy environment, the effect is completely inaudible.
Positives: The quiet, pleasant sound offers a clear, non-distracting confirmation to the user and anyone nearby without causing alarm.
Negatives: The sound is too quiet to serve as a signal over any real distance.

Touch

User’s Perspective: As the line of light is projected, a low-frequency vibration begins in the ironwood body of the tool, a steady, deep hum that you can feel in your hands and arms. It is a tactile reassurance that the spirit within is actively working. The brass fittings on the level become noticeably cool to the touch for the duration of the effect.
Observer’s Perspective: An observer perceives nothing through the sense of touch.
Positives: Provides you with constant, clear, non-visual feedback that the ability is active.
Negatives: The sensory feedback is entirely personal to you and offers no information to others.

Smell

User’s Perspective: A faint, clean scent is released when the light appears. It is the scent of cool, still air, like the inside of a cave that has never been disturbed, or the crisp smell of petrichor without the preceding rain.
Observer’s Perspective: An observer would have to be very close to notice any scent at all.
Positives: The clean, subtle scent reinforces the precise and non-chaotic nature of the magic being used.
Negatives: The scent is too faint to be of any practical use as a signal or warning.

Taste

User’s Perspective: A fleeting, clean taste appears on the tongue, reminiscent of mineral water or fresh snow.
Observer’s Perspective: There is no perception of taste for an observer.
Positives: A minor, personal sensory confirmation of the magical activation.
Negatives: An entirely subjective sensation with no tactical value.

Extra-Sensory Perceptions

User’s Perspective (Geometer’s Sense): You feel the bound spirit within the level “reach out” from the tool. It’s a feeling of focused extension and immense concentration. You have an unshakable, intuitive knowledge that the projected line is perfectly, mathematically true, level, and straight. You can even perceive if an object or creature intersects the line of light, feeling it as a minor “disturbance” in the projected beam.
Observer’s Perspective (Magical Sense): A magically-aware observer would perceive a highly ordered and stable act of magic. They would see the spirit’s aura flare and then project a coherent beam of Divination and Conjuration magic. The energy is stable, constructive, and precisely controlled. They would immediately recognize the tool not as a weapon, but as an instrument of a master builder, surveyor, or engineer, a tool for imposing order upon the world.
Positives: You are granted a level of confidence in your measurements that is absolute. The clear, non-hostile nature of the magic is obvious to magical senses, preventing misunderstandings with other magic users.
Negatives: Any magically-aware entity, friendly or hostile, will immediately understand your capabilities and the nature of your tool. A rival engineer could gauge the quality of your equipment, and an enemy would know you are likely a support or utility-focused individual, not a combatant.

Protocol for the Inscription and Binding of a Surveyor’s Level

The creation of a Surveyor’s Spirit-Level is a masterwork of three distinct and demanding disciplines: fine woodworking, precision metalworking, and the specific, industrial magic of Summoning 313. It is a process that requires immense patience and a profound respect for the principles of order and harmony, as the final step involves inviting a spirit to willingly inhabit the vessel the artisan has made.

Materials Needed:

Ironwood Billet: A single, flawless piece of petrified Ironwood, at least two feet in length and free of any knots, cracks, or imperfections. The wood must have been aged for a minimum of one century to ensure absolute stability.
High-Purity Brass: A small ingot of refined brass, to be machined into the end caps and fittings for the central quartz housing.
Resonant Quartz Cylinder: A flawless, cylindrical tube of clear quartz, precisely machined and polished. The quartz must be lab-grown under controlled magical conditions to ensure it has no internal fractures that could disrupt the spirit’s resonance.
The Lure Stone: A perfect, naturally-formed spherical lodestone. Its magnetic field must be uniform and strong, as its alignment with the world’s greater forces will serve as the lure for the spirit.
Alchemical Sealing Resin: A prepared mixture of heated amber, refined to a clear liquid, with a single drop of quicksilver suspended within it. This resin creates a perfect, hermetic, and magically resonant seal when it cools.

Tools Required:

Master’s Woodworking & Metalworking Suite: This includes a precision lathe, planing tools, fine-toothed saws, and a set of carving gouges for the woodwork. For the metal, a small furnace and tools for milling and polishing brass are required. Precision calipers are essential for all stages.
Portable Binding Matrix: A set of interlocking, etched metal plates that, when assembled and energized, create a stable containment field suitable for a minor, non-sentient spirit.
A Calibration Chamber: The final stages of the ritual cannot be performed in a common workshop. They must take place in a specially constructed room with foundations sunk to bedrock, where a perfectly level and stable floor has been consecrated. This chamber must be isolated from all external vibrations and chaotic magical energies.

Skill Requirements:

Master Artisan (Wood & Metal): The physical construction of the level must be flawless. Any imperfection in the vessel—a slight warp in the wood, an imbalanced fitting—would be an insult to the geometer-spirit and would cause the summoning to fail.
Summoning & Binding (Adept): The crafter must be proficient in the theory and practice of Summoning 313. They must know the ritual chants and how to safely operate and energize the Binding Matrix.
Geomancy or Surveying (Journeyman): The crafter must have a deep, personal understanding of the principles of true level, plumb, and gravitational alignment. They are not merely building a tool, but creating a perfect home for a spirit that embodies these concepts.

Crafting Steps:

Fabrication of the Vessel: This is the longest and most labor-intensive physical stage. The artisan shapes the Ironwood billet into the body of the level, carving the decorative geometric patterns and hollowing out the central chamber for the quartz tube. Concurrently, they machine the brass fittings to exacting tolerances. The quartz tube must fit into its housing with no gaps or stress. At the end of this stage, the level is a beautiful but empty and non-magical tool.
Preparation of the Chamber: The artisan transports the finished vessel and all other components to the Calibration Chamber. They assemble the Portable Binding Matrix on the perfectly level floor. The empty level is placed in the exact center of the matrix. The quartz tube is placed in its housing but not yet sealed, and the spherical lodestone is placed inside the open tube.
The Call to Order: This begins the summoning. The artisan energizes the Binding Matrix, which hums to life, creating a stable dome of magical energy. They then begin the ritual chant of Summoning 313. The chant is not a command, but an invitation. It harmonizes with the perfect alignment of the lodestone, sending out a “signal” of pure, geometric order into the aether. This signal is irresistible to any free-roaming geometer-spirits in the vicinity.
The Symbiotic Binding: Eventually, a single spirit—a shimmering mote of silvery light—will be drawn in by the call. It will manifest within the matrix, see the perfection of the lodestone, and feel the flawless craftsmanship of the wooden vessel. Geometer-spirits are driven by a singular desire for order and stability; to them, the level is not a prison, but the most perfect and desirable home they have ever encountered. The spirit will willingly enter the quartz tube to be closer to the lodestone. At this moment, the artisan’s job is to gently remove the lodestone (its purpose as a lure fulfilled) and use the alchemical resin to create a perfect, instantaneous seal on the ends of the quartz tube. The spirit is now bound not by force, but by its own desire to inhabit the perfect space that has been created for it.
The First Calibration and Sealing: The artisan deactivates the Binding Matrix. The tool is now alive, the mote of light hovering contentedly within. The final step is to test the work. The artisan uses the newly completed Spirit-Level to verify the perfect level of the Calibration Chamber’s floor. The spirit’s immediate and precise response is the confirmation of a successful binding. A final, reverent polishing of the brass fittings is performed to seal the work and honor the spirit within.

Girl Who Listened to Ground

In an age that is now itself a deep foundation, there stood the city of Lys, which was called the Jewel of the Marshes. Its towers were like needles of white stone, and its plazas were paved with polished river rocks that shone in the sun. Great was the pride of its builders. But their pride was a house built upon a lie, for they had raised their beautiful city upon the soft, wet earth of the Great Fen, a foundation of ambition, not of wisdom.

And so it came to pass that the ground, which is patient but does not forget, began to claim its due. The city of Lys began to sink. It did not sink all at once, but slowly, unevenly, like a tired man slumping into his chair. A tower would lean to the north one year, a plaza would crack to the south the next. The canals, once straight and true, became crooked smiles full of stagnant water. The great engineers of Lys, men of much learning and many complex tools, were summoned. They made great calculations. They drove timbers deep into the mud. But the mud was without honor and it swallowed their timbers, and their calculations were meaningless, for they were measuring a dream, not the world as it was. The city was in despair, for its beauty was becoming a ruin.

The Prince of Lys, seeing his jewel cracking, made a desperate proclamation. He would grant the title of Chief Engineer and great riches to any person, of any station, who could show him a way to halt the city’s slow death. The great engineers scoffed, for they had already failed.

Then came a young woman to the Prince’s court. Her name was Mira, and she was an apprentice from a small guild that no one had heard of. She carried no great rolls of blueprints, only a single tool: a two-foot length of dark wood, capped with brass, which she called her level. The court laughed. “The masters have failed with all their science,” they said. “What can a girl do with a stick?” But the Prince was desperate, and he let her try.

Mira did not look at the leaning towers. She did not measure the cracked plazas. She went to the lowest part of the city, where the mud bubbled, and she laid her strange level upon the ground. She closed her eyes. She stood this way for a long time. She was not looking, she was listening. For days and weeks, she walked every street and alley of Lys. She would stop, lay her tool upon the ground, and listen. The spirit that was bound within her tool, it was singing to her the song of the deep stone.

Where the engineers saw only one thing, which was mud, the spirit in the level allowed Mira to perceive the truth that was hidden beneath. Her hand on the tool would feel a low, steady hum, and she would know that far, far below, there was a channel of solid bedrock, a true bone of the world. Then she would walk further, and the hum would become a rattling buzz, and she would know the ground here was treacherous and full of shifting peat. She made a map, not of the city that all could see, but of the secret, invisible foundation that lay sleeping beneath it.

After one full moon of this work, she returned to the Prince. She unrolled her map. The great engineers looked and saw only strange, wandering lines. “What is this foolishness?” they demanded.

Mira spoke, and her voice was quiet but clear as a bell. “You try to fix the branches of a sick tree. I have listened to its roots. The foundation of Lys is a lie. But beneath the lie, the world is still true. These lines are the bones of the world, the channels of bedrock upon which we must build.” She proposed a great and terrible work: to abandon the mending of the surface, and instead to sink great pylons of stone and iron deep through the mud, to anchor the entire city to the bedrock channels she had mapped.

It was a mad plan, a plan of immense cost and labor. But it was the only plan that was built upon truth. And so the work began. For every pylon, Mira would use her level. With its Line of Sight, she would project a line of silver light, a ghost-string of perfect truth, to ensure each support was perfectly plumb. With its measure of a True Yard, she would space the footings with a precision the eye could not grant.

Slowly, year by year, the great work was done. A new foundation, an unseen forest of stone and iron, grew in the depths beneath the city. And the sinking stopped. The leaning towers were straightened, their weight now held by the true bones of the world. The city of Lys was saved, not by fighting the marsh, but by listening to it and honoring the truth it held. Mira, the apprentice with the simple stick, was made Chief Engineer, and her name was given more honor than any prince.

The Moral of the Story: A beautiful structure built upon a hidden lie will always fall. True strength is found not in the grandeur of the walls, but in the truth of the foundation upon which they stand.

Suggested conversions to other systems:

Call of Cthulhu (7th Edition)

The Geometer’s Eye

This appears to be a two-foot-long, masterwork-quality spirit level, crafted from a dark, heavy wood and fitted with polished brass. Instead of a bubble, a mote of silvery light floats within a central quartz tube. It was recovered from the effects of Professor Armitage after his expedition to the Antarctic, though he never spoke of its use. It grants an unnerving, perfect sense of spatial relationships, which can be as maddening as it is useful when confronted with non-Euclidean realities.

Game Mechanics:

Perfect Artifice: Grants one Bonus Die on any Architecture, Craft (Carpenter/Stonemason), or Mechanical Repair roll where building or assessing something perfectly level or plumb is a factor.
Resonant Sounding: When placed on a floor or structure, the user can make a Listen roll. If successful, the Keeper will inform them of the nature of the material beneath (solid bedrock, hidden cavity, unstable rubble, etc.) up to a depth of 10 feet.
Project True Line: Once per hour, the user can cause the level to project a faint, silvery line of light. This line can be set to be exactly one yard long or up to 100 feet long and is always perfectly level. The line itself is mundane, but using it to measure things in a place of warped geometry (such as R’lyeh or the library of a Yithian) requires a Sanity roll (0/1d2 SAN loss) as the line visibly struggles to remain straight.

Blades in the Dark

The Foundation-Spirit Level [Fine, Surveyor’s, Arcane]

A relic from before the cataclysm, this surveyor’s level is said to contain a small, willing earth-spirit that desires nothing more than perfect, stable order. Leech-smiths and Surveyors use it to read the “bones” of the city and find the few stable places left to build, or the many weak places ripe for demolition.

Game Mechanics:

When you Survey a building or location before a score, you can use the level to analyze its structural integrity. You gain +1 effect on your information gathering. When you act on this information later, you may tick a box on this item’s tracker.
You can use the level to create an opportunity. When you want to find a precise angle for a ricochet, measure a perfect distance for a trap, or identify the keystone of an archway, you can do so. Tell the GM what perfect line or measurement you create.
After you’ve ticked 3 boxes, you can make a special downtime action to “Map the Unseen.” Describe how you use the level’s readings to create a detailed blueprint of a location’s hidden weaknesses or structural secrets. The GM will award you one piece of valuable, actionable intelligence for a future score.

Dungeons & Dragons (5th Edition)

The Geometer’s Rule Wondrous item, uncommon

This two-foot-long level is crafted from a single piece of polished ironwood with brass fittings. A mote of silver light floats within a crystal tube in its center, moving unerringly to indicate true level.

The Geometer’s Rule has 5 charges. It regains 1d4 + 1 expended charges daily at dawn.

While holding the level, you can use an action to expend 1 or more of its charges to activate one of the following properties:

Resonant Survey (1 Charge). You place the level on the ground or a structure. You learn the nature of the terrain or structure in a 20-foot radius around the level, up to a depth of 20 feet. You instantly know the locations of any hollow spaces (such as secret passages or sinkholes) and areas of structural instability.
Line of Truth (1 Charge). You cause the level to project a straight, thin line of silvery light that is 100 feet long and 1/4 inch thick. The line is perfectly level and lasts for 10 minutes.
The Perfect Yard (1 Charge). You cause the level to project a straight, thin line of silvery light that is exactly 3 feet long and lasts for 10 minutes.

Knave (2nd Edition)

Spirit Level (1 inventory slot, bulky)

A heavy, dark-wood-and-brass spirit level. A mote of silver light floats in its central crystal tube, showing true level with perfect accuracy.

If you place it on a surface (a floor, wall, or ceiling), the GM will tell you if the area within 10 feet of it is hollow, unstable, or solid.
Three times per day, you can make it project a faint line of silver light. You can choose if the line is 100 ft. long (and perfectly level with the tool) or exactly 1 yard long. The line lasts for one turn (10 minutes).
When you are building or repairing a structure, using the level allows you to work twice as fast.

Fate Core System

The Level of the True Foundation

This item is an Extra that provides a core Aspect for the tool and several Stunts the character can perform while using it.

Aspect: The World Itself Shows Me the True Way

This Aspect can be invoked for a bonus on any action that involves building something to last, finding a hidden flaw in a structure, or navigating treacherous terrain. The GM can compel this Aspect by having the level reveal an inconvenient truth—that the cornerstone of the temple is cracked, or that the bridge the party needs to cross is moments from collapse—forcing a difficult decision.

Stunts:

Geometer’s Eye: Because I use The Level of the True Foundation, I can use the Investigate skill to survey the ground beneath me. On a success, I can create the situational Aspect Stable Footing or Hollow Ground on the zone with one free invocation.
A Line in the Darkness: Because I use The Level of the True Foundation, twice per session, I can project a perfect line of light from the level. This allows me to automatically succeed at an Overcome roll where the primary obstacle is accurately judging a straight line, a level plane, or a short distance.
Flawless Design: Because I use The Level of the True Foundation when I am using the Crafts skill to build or repair a structure, I can spend a Fate Point to declare that the work is exceptionally sound. It gains the Aspect Built to Last with one free invocation.

Numenera & Cypher System

Geomorphic Resonance Level

This device is a rod of smooth, heavy synth, capped with brass-like alloy. A mote of silvery energy within a central quartz tube provides its readings. It is a piece of terraforming or survey equipment from a prior world, designed to analyze terrain with perfect accuracy.

Level: 4
Form: A two-foot-long rod of a dense, dark synthetic material.
Effect: The level provides an intuitive understanding of the environment. Any task involving assessing structural integrity, finding stable ground, or making precise architectural measurements is eased. The user can also activate one of two functions:
1. Project Alignment Vector: As an action, the user can cause the device to project a line of coherent light. The user chooses the length: either exactly one meter, or up to 50 meters. The line is perfectly level with the local gravity field and remains visible for one minute. This function does not require a depletion roll.
2. Subterranean Scan: The user can spend one minute concentrating while the level is on the ground to initiate a deep resonance scan. The GM provides a simple mental map of the area within a long-range radius, showing major structural features, cavities, and material densities up to a depth of 20 meters. Activating this survey function requires a depletion roll.
Depletion: 1 in 1d20 (check only when using the Subterranean Scan function).

Pathfinder (2nd Edition)

The Stonemason’s Truth Item 2 Uncommon Divination Magical Usage held in 1 hand; Bulk 1

This heavy, darkwood and brass level contains a mote of silver light that moves to indicate a perfect, unerring level. It is said the first of these were gifts from Dwarf artisans to the early architects of the Empire, to ensure their constructions would be worthy.

Passive: While holding this level, you gain a +1 item bonus to Crafting checks to build or repair structures, and to Perception checks to find secret doors or structural flaws in stonework.
Activate [one-action] (manipulate)
- Effect You project a thin line of silver light from the level that is up to 120 feet long. The line is perfectly level and straight, and it lasts as long as you continue to Sustain the Activation (this functions like Sustaining a Spell).
Activate [one-minute] (concentrate, divination, exploration)
- Frequency once per 10 minutes
- Effect You place the level on the ground and survey the area. For the next minute, you are aware of the location of any hazardous ground, such as sinkholes or areas of collapsing floor, within a 30-foot radius.

Savage Worlds Adventure Edition (SWADE)

The True-Line Level

An exquisitely made surveyor’s level that feels unusually heavy and hums with a faint energy. It is an indispensable tool for any serious architect, engineer, or artillery captain. Requirements: Novice, Smarts d6+

Benefits:

Master Artisan: The wearer gains a +2 bonus to all Repair or Knowledge (Engineering) rolls related to construction or architecture.
Hazard Sense: The wearer automatically detects mundane structural traps (like pit traps or collapsing ceilings) if they are actively looking for them. No roll is needed.
Guiding Light: As an action, the wearer can project a line of faint light up to 12″ (24 yards) long. This line can be used as a guide for a ranged attack. The next friendly character to make a Shooting attack against a target on that line ignores up to 2 points of penalties from any source.

Shadowrun, Sixth World

Ares Geo-Tactical Surveyor

This device, marketed by Ares Arms as a “construction and demolition tool,” is a favorite among corporate saboteurs and high-end security riggers. It looks like a rugged, professional-grade spirit level but integrates a suite of sensors including ground-penetrating radar, laser line projectors, and material resonance scanners that feed data directly to the user’s commlink or cybereyes.

Type: Advanced Sensor Device
Rating: 1-4
Availability: (Rating x 3)R
Cost: (Rating x 3,000)¥

Game Mechanics:

Integrated Assist: The wearer gains a dice pool bonus equal to the device’s Rating on all Engineering tests related to construction, demolition, or structural analysis.
Laser Line-Guide: As a Minor Action, the user can project a perfectly level laser line up to 200 meters. If used as a targeting guide for an ally, that ally gains 1 Edge on their next ranged attack made along the laser’s path.
Resonance Scan: As a Major Action, the user can perform a detailed scan of a structure or 10-meter patch of ground. They learn the location of hidden compartments, cavities, or structural weaknesses. For the rest of the scene, any Demolitions test to damage or destroy the scanned object gains a dice pool bonus equal to the device’s Rating.

Starfinder

Geomorphic Analysis Level Level 2; Price 950 credits Slot held (1 hand); Bulk 1 Type technological item

This advanced surveying tool is indispensable for planetary surveyors, starship engineers, and those who explore the ruins of lost alien civilizations. It projects laser guides and uses sonic resonance to analyze structures with incredible accuracy.

While holding this level, you gain a +2 circumstance bonus on Engineering checks to build or repair starships and structures, and on Perception checks to find traps or secret doors in walls and floors.
As a move action, you can activate the level to project a thin, visible laser line up to 120 feet long. The line is perfectly straight and can be oriented as you choose. The line remains active for 1 minute or until you deactivate it as a free action.
As a standard action, you can scan a 15-foot cone originating from the level. You learn the location of any areas of difficult terrain, as well as hidden hazards like pits or unstable flooring, within the cone.

Traveller (Mongoose 2nd Edition)

LSP ‘True-Sight’ Engineering Suite

A standard piece of high-tech equipment from Ling-Standard Products, the True-Sight is a durable, all-in-one tool for colonial surveyors and starship engineers. It combines a laser level, a material densitometer, and a simple targeting computer into one rugged package.

Tech Level (TL): 11
Cost: Cr 12,000
Effect:
- Passive: The user gains DM+1 on all Engineer or Science (geology) checks where precision measurement or structural analysis is required.
- Laser Level: As an action, the device can project a laser line visible up to 500 meters. The line is perfectly level and can be used to provide DM+1 to an allied character’s next attack with a ranged weapon, provided the user spends their action ‘painting’ the target.
- Densitometer Scan: The device can perform a ground-penetrating scan of a 10m x 10m area. This takes one minute. The user receives a simple wireframe map of the subterranean area up to 20m deep, revealing tunnels, cavities, and significant changes in material density. This grants DM+2 on the next check made to excavate or exploit a feature discovered with the scan.

Warhammer Fantasy Roleplay (4th Edition)

Dwarf Engineer’s Runic Level

This is no flimsy manling tool. It is a solid length of dark oak bound in gromril, with runes of Stability, Truth, and Measure meticulously carved into the metal. The central viewing chamber does not contain a bubble, but a single, magically contained drop of water from a sacred spring deep within a Dwarf hold, which points to true level with unerring accuracy. It is a masterwork of the Engineers’ Guild.

Qualities: Magical, Masterwork, Durable
Encumbrance: 1

Game Mechanics:

Grungni’s Precision: While using this tool, you gain a +20 bonus to all Trade (Engineer) Tests. Furthermore, when you are in charge of a construction or fortification effort during downtime, the work is completed 25% faster.
Find the Flaw: Once per day, you may spend a full round surveying a single man-made structure (a wall, gate, bridge, door, etc.). For the remainder of the scene, you and any allies you direct automatically succeed on all Perception Tests to spot weak points on that structure. Furthermore, all attacks made against that structure gain the Penetrating Quality as you guide the strikes to maximum effect.
Sense Unstable Ground: The spirit within the water drop is offended by shoddy or treacherous stonework. You automatically detect any mundane architectural traps (such as pit traps or collapsing floors) before you step on them, as long as you are actively taking care and proceeding at no faster than a walking pace.