Tome of Esoteric Lore

From: Astellens

Stats:

• Level: Tier 1
• Stats Modifier: None
• Skills: None
• Cost: 600 gold pieces (or equivalent value in your game’s currency)
• Tags: Book, Magical, Enchanted, Knowledge, Arcana, Rituals, Forbidden, Cursed, Scholarship, Ancestral, Relic, Insight, Mysticism

Lore: The Tome of Esoteric Lore is a highly sought-after artifact, rumored to have been penned by an enigmatic archmage who delved into the deepest secrets of the arcane arts. Bound in thick, aged leather, the tome is adorned with cryptic symbols and contains a wealth of hidden knowledge. The pages within are filled with spells, rituals, and obscure information gathered from various arcane disciplines, offering its reader access to a vast array of arcane power.

Use in the Game: The Tome of Esoteric Lore is a prized possession for spellcasters who seek to expand their magical repertoire. When in possession of this tome, the creature gains the ability to cast one additional spell from their spell list of a level they can cast. This grants them an expanded range of magical abilities, allowing them to tailor their spell selection to suit the challenges they may face.

The chosen spell must be selected during a long rest, representing the dedicated study and absorption of the tome’s contents. The spell can be changed only upon gaining a new level or through a rare quest or event, signifying the complexity and weight of the knowledge contained within the tome.

The Tome of Esoteric Lore is a highly coveted item, often passed down through generations of wizards, hidden within ancient libraries, or guarded by powerful magical beings. It represents the pinnacle of arcane knowledge and the relentless pursuit of understanding the intricacies of magic. Those who possess the tome are regarded as scholars and authorities in the arcane arts, wielding spells and rituals that surpass the ordinary limits of their magical abilities. The tome becomes a symbol of their dedication to unraveling the secrets of the arcane, granting them a wellspring of magical potential waiting to be tapped into.

Spells within:

• Veil of the Ether
  • Level: 3rd-level Illusion
  • Casting Time: 1 Action
  • Range: Self
  • Duration: Concentration, up to 10 minutes
  • Description: This spell allows the caster to step partially into the ethereal plane, shrouding themselves in a shimmering veil. While in this state, the caster is lightly obscured and gains advantage on Stealth checks. The caster can also pass through walls and solid objects, but must remain within 10 feet of their starting position or be forcefully returned, taking 1d10 force damage.
  • Lore: Known only to a few illusionists, this spell was devised to aid mages seeking refuge from powerful adversaries without revealing their location.
• Whisper of Ages
  • Level: 2nd-level Divination
  • Casting Time: 1 Minute
  • Range: 30 feet
  • Duration: 1 Hour
  • Description: By focusing on an ancient object or location within range, the caster can hear faint whispers of past events tied to it. This allows the caster to learn fragments of history, important events, or knowledge that took place in its presence. The knowledge may be cryptic and requires an Intelligence check (DC determined by the DM) to fully interpret.
  • Lore: Often considered invaluable by historians, this spell has allowed scholars to uncover long-forgotten truths about powerful relics and ruins.
• Soulbinding Glyph
  • Level: 4th-level Necromancy
  • Casting Time: 1 Hour
  • Range: Touch
  • Duration: Permanent until dispelled
  • Description: This powerful glyph allows the caster to bind a willing creature’s spirit to a location or object, such as a family heirloom, to keep their essence within it after death. Once bound, the spirit can communicate telepathically with anyone touching the object or at the designated location. While bound, the spirit cannot be raised or resurrected by normal means.
  • Lore: This ritual is known to have been used by ancient archmages to preserve their wisdom beyond death, although it can create cursed objects if the spirit turns vengeful.
• Conflux of Elements
  • Level: 5th-level Evocation
  • Casting Time: 1 Action
  • Range: Self (60-foot radius)
  • Duration: Concentration, up to 1 minute
  • Description: The caster channels elemental forces into a swirling vortex around them, drawing upon fire, water, earth, and air. Each round, the caster can release one elemental burst within range, choosing an element to deal 4d8 damage of that type (fire, cold, bludgeoning, or lightning) in a 10-foot radius. Creatures caught in the burst must make a Dexterity saving throw, taking half damage on a success.
  • Lore: Thought to be an ultimate expression of evocation magic, this spell showcases the mastery over all elemental forces, making it both rare and incredibly dangerous.
• Mantle of Forgotten Shadows
  • Level: 3rd-level Transmutation
  • Casting Time: 1 Action
  • Range: Touch
  • Duration: 8 Hours
  • Description: The caster cloaks a willing creature in a shadowy aura that suppresses their presence. While cloaked, the creature cannot be detected by magical means such as divination spells, and it appears faintly obscured to the naked eye. The spell ends early if the creature attacks or casts a spell.
  • Lore: This spell is often used by spies and agents of secrecy, making it a favorite among those who value invisibility beyond ordinary sight.
• Arcane Echo
  • Level: 1st-level Enchantment
  • Casting Time: 1 Bonus Action
  • Range: 30 feet
  • Duration: Concentration, up to 10 minutes
  • Description: The caster creates an intangible echo of an arcane presence, allowing them to “leave” a magical resonance in one location. This echo emits a faint magical aura detectable by other mages or creatures with arcane sensitivity. Casters or creatures that detect the echo may become intrigued or investigate further, though it holds no true power or consciousness.
  • Lore: Often used by wizards to distract or lure others, this spell is particularly effective in dungeons, libraries, or any environment where multiple magical auras exist.
• Chant of the Veiled Mind
  • Level: 4th-level Abjuration
  • Casting Time: 10 Minutes
  • Range: Self
  • Duration: 24 Hours
  • Description: This powerful ward shields the caster’s mind from psychic intrusion, granting immunity to mind-reading, charm effects, and telepathic communication. Additionally, the caster gains advantage on Wisdom saving throws against any spell or effect that attempts to alter their mental state.
  • Lore: The chant is said to be a blend of numerous ancient languages, allowing it to mask the caster’s mind even from otherworldly entities, making it a prized spell for those who guard forbidden secrets.

In the world of Saṃsāra, the Tome of Esoteric Lore is a rare and coveted item, typically found only in specialized shops that cater to powerful wizards, scholars, and seekers of arcane knowledge. Because of its highly sought-after secrets and mysterious origins, it commands a high price and is surrounded by an air of exclusivity and intrigue. Here are the types of shops where the tome may be bought or sold and the expected costs in each:

• Mystic Libraries
  • Location: Ancient cities like Zephyrkeep or Arcana’s Reach, within walled universities or secretive guild halls.
  • Description: Mystic Libraries are quiet, heavily guarded repositories of knowledge where only trusted scholars, wizards, and members of exclusive guilds can browse. The tome is not on display but locked in restricted sections or hidden rooms and may require special permission or a quest to access.
  • Cost: 1,200–1,500 gold pieces
  • Notes: Buyers may need to demonstrate their magical prowess, pass a series of tests, or even complete a mission for the library’s archmage to obtain the tome. Only those deemed “worthy” are allowed to purchase such a relic.
• Arcane Curiosity Shops
  • Location: Smaller, enigmatic shops in areas like the Wandering Market of Ember’s Crossing or the Moonlit Bazaar, often on hidden streets or alleyways that change location or appear only at certain times.
  • Description: These shops sell rare and unusual magical items, often run by eccentric shopkeepers who deal in artifacts, relics, and items from unknown realms. The tome may be displayed behind glass or in a cabinet of curiosities, surrounded by protective wards and glyphs.
  • Cost: 900–1,200 gold pieces
  • Notes: Buyers should expect to haggle or perhaps offer another rare item in trade. These shopkeepers prize stories and history, so recounting tales of magical deeds or offering information about unique spells might earn a small discount.
• Guild Armories and Vaults
  • Location: Magical guild halls in cities like Sunhaven, where high-ranking members store valuable or dangerous items.
  • Description: Guild armories are rarely open to the public, but influential adventurers or guild members might gain access. Here, the Tome of Esoteric Lore may be stored alongside other magical treasures, available only to those who complete special guild quests or make significant donations.
  • Cost: 800–1,000 gold pieces (may require additional favors or quests)
  • Notes: This price reflects the cost for guild members; outsiders may pay double if the guild is even willing to sell. Non-members may be asked to perform services, such as recovering another lost artifact.
• Black Market Dealers
  • Location: Underworld bazaars in places like the Shadowfen or the subterranean Veiled Markets beneath major cities.
  • Description: The tome can occasionally be found through black market dealers, often appearing “between owners” or after being stolen from a prominent wizard. Its presence in these markets is rare and fleeting, and it is often sold under a veil of secrecy to avoid detection by authorities or rival spellcasters.
  • Cost: 600–900 gold pieces
  • Notes: Buyers should be wary, as black market dealers may sell altered or cursed versions of the tome. Purchasing from these dealers can bring unwanted attention from authorities or rival mages, making it a riskier but potentially cheaper option.
• Temple of Arcane Mystery
  • Location: Remote temples dedicated to the preservation of arcane wisdom, often found in secluded or enchanted areas like the Spire of Eternal Light or the Eldergrove.
  • Description: These temples serve as sanctuaries for those seeking enlightenment through magic, guarded by monks and sages. The tome may be available, but only to those deemed spiritually and intellectually worthy. Prospective buyers are usually required to undergo a series of mental and magical trials.
  • Cost: 1,000–1,300 gold pieces (or the equivalent in rare offerings)
  • Notes: The temple’s guardians prioritize wisdom and restraint over wealth, so rare knowledge, artifacts, or sacred items may be accepted in trade rather than gold. The process to purchase the tome could take weeks and may include studying within the temple or passing specific tests.

In each of these settings, acquiring the Tome of Esoteric Lore is more than a simple transaction. The process reflects the tome’s rarity and the respect demanded by its powerful secrets. As a result, the item’s availability and pricing vary, emphasizing its value and the unique journey required to claim its arcane knowledge.

The Tome of Esoteric Lore serves as a powerful resource for arcane defense and offense, often with effects that extend beyond traditional spells or weapons. Here’s how this rare artifact might be used in various environments within roleplay scenarios, highlighting its defensive and offensive applications across different landscapes in Saṃsāra.

• Ancient Ruins and Dungeons
  • Defense: The tome’s knowledge of spells like Veil of the Ether allows the user to pass through walls and barriers, evading traps or ambushes by slipping into the ethereal plane temporarily. The caster can also use Chant of the Veiled Mind to ward against psychic intrusions or charm effects, protecting their mind from ancient curses or spirit attacks often found in ruins.
  • Offense: The user can prepare spells like Conflux of Elements to unleash destructive elemental energy against hostile creatures that might inhabit ruins, such as undead or elemental beings. In tight dungeon corridors, Arcane Echo can serve as a powerful distraction, luring enemies away with illusory magical presences, allowing the caster to evade or ambush foes strategically.
• Dense Forests and Jungles
  • Defense: In forests, the tome’s spells like Mantle of Forgotten Shadows allow the user to blend in with the natural environment, rendering them invisible to enemies and beasts alike. This can be particularly effective in avoiding predatory creatures, hostile patrols, or even hunters. For additional security, Whisper of Ages can reveal past events tied to certain ancient trees or stones, offering hints about lurking dangers or safe paths.
  • Offense: The Soulbinding Glyph spell from the tome can be inscribed onto trees or natural landmarks, binding the spirit of a fallen creature to protect the area. This spirit can warn the caster of intruders or even defend the caster by frightening or confusing enemies. The Conflux of Elements spell also proves effective, allowing the user to unleash area-based elemental attacks, like flames that scorch dense undergrowth or ice bursts to control the battlefield.
• Urban and City Environments
  • Defense: The tome’s Mantle of Forgotten Shadows spell helps the caster move undetected in crowded urban settings or escape pursuers in tight alleys by shrouding themselves in shadows. In more direct conflicts, Chant of the Veiled Mind wards against attempts by authorities or rival spellcasters to charm, intimidate, or scry on the caster.
  • Offense: Urban areas provide plenty of uses for Arcane Echo to create false magical signals, luring or distracting city guards, rival mages, or thieves. For bolder moves, the caster can use Veil of the Ether to phase through barriers or locked doors, entering buildings undetected to gather information or launch surprise attacks.
• Deserts and Open Plains
  • Defense: In open landscapes, Whisper of Ages can be used to uncover past secrets hidden in desert ruins or buried artifacts. The caster might find hidden shelters, enchanted springs, or detect lurking dangers like magical wards or traps by calling upon ancient memories. Mantle of Forgotten Shadows can provide camouflage from far-seeing creatures or bandits, allowing the caster to remain hidden against the open horizon.
  • Offense: The harshness of deserts and plains can be turned against foes with Conflux of Elements, channeling blasts of sand, fire, or lightning to disorient and damage enemies in the open. If the caster has bound a spirit with Soulbinding Glyph, they can call on it to haunt the dunes, spooking intruders or desert predators, buying time to reposition or escape.
• Coastal and Aquatic Settings
  • Defense: Along coasts or near bodies of water, the Veil of the Ether spell allows the caster to escape underwater threats by momentarily phasing into the ethereal plane, protecting them from physical attacks or ocean currents. For additional security, Chant of the Veiled Mind can block telepathic attacks from deep-sea creatures or prevent magical charm from aquatic spellcasters like sirens.
  • Offense: On coastal shores, Conflux of Elements can summon water-based elements or storm-like effects, blasting foes with waves or thunderous bursts. The Soulbinding Glyph can also serve to trap the essence of a defeated sea creature within a coral or shell, serving as a future ally or guardian that can warn the caster of approaching threats on the water.
• Mountainous and Rocky Terrain
  • Defense: The tome’s Mantle of Forgotten Shadows can provide camouflage in the shadows cast by high cliffs, allowing the caster to avoid detection by aerial creatures or mountain patrols. Whisper of Ages might reveal past events in remote temples or ruins, granting the caster knowledge of hidden passages or dangerous cliffs.
  • Offense: On treacherous slopes, Conflux of Elements is especially potent, enabling the caster to summon rockslides, ice storms, or blasts of fire to control narrow paths. The Soulbinding Glyph can bind a spirit to a specific rock or cliffside, causing hostile creatures to become wary of the mountain’s “haunted” areas, discouraging enemies from pursuing the caster.
• Underworld or Shadowy Caverns
  • Defense: In caverns, Veil of the Ether becomes invaluable for navigating tight, treacherous spaces, allowing the caster to slip past barriers or avoid detection. Chant of the Veiled Mind wards against the psychic influence of mind-bending creatures that dwell in these depths.
  • Offense: The Arcane Echo spell is highly effective in caverns, creating illusory magical presences that can lead enemies away into darkness or set up ambushes. Conflux of Elements can create deadly rock slides, freeze underground pools, or cause bursts of flames to fill dark passages, allowing the caster to control the cavern’s terrain in battle.

In each of these environments, the Tome of Esoteric Lore adapts to the landscape, empowering the caster with both offensive and defensive capabilities tailored to their surroundings. The tome enables a spellcaster to employ advanced strategy, concealment, and elemental manipulation, showcasing the caster’s knowledge and mastery over the mysteries of the arcane arts.

Perception of Activation: Tome of Esoteric Lore

• User’s Perspective
  • Sight: The tome’s symbols glow with a soft, shifting light, and runes appear to rise from the pages like ghostly apparitions. The text seems to rearrange itself, revealing deeper layers of secrets.
  • Sound: A faint whispering fills the air, as if countless voices are reciting spells, ancient knowledge, or half-forgotten tales. The sound shifts as the user focuses, aligning with their intentions or questions.
  • Touch: The leather feels warm, almost alive, pulsing with an internal rhythm like a heartbeat. The sensation spreads through the user’s fingers, connecting them to the tome’s ancient energy.
  • Smell: A distinct aroma of aged parchment and faint hints of incense or herbs used in magical rites fills the air, evoking images of ancient libraries and ritualistic spaces.
  • Taste: A subtle metallic taste lingers in the mouth, hinting at the power flowing through the tome—almost like tasting raw arcane energy.
  • Extrasensory Perceptions:
    • Memory Recall: When touching the tome, the user feels memories stirring, like they’re pulling fragments of knowledge from another life or dimension. Thoughts and images unrelated to the present occasionally surface.
    • Empathic Resonance: A sensation of other presences or past readers fills the user’s mind, sometimes overwhelming, as if connecting to minds from across time.
• Observer’s Perspective
  • Sight: The tome emits a faint, otherworldly glow, with symbols and runes rising from the pages in wisps of light. The book’s aura extends around the user, cloaking them in a shimmering field of magic.
  • Sound: Observers might hear faint whispers in an unknown language if close enough, inducing curiosity or even unease. The sounds seem to come from all directions, impossible to pinpoint.
  • Extrasensory Perceptions:
    • Arcane Attraction: For those sensitive to magic, the tome’s activation is unmistakable, creating a magnetic pull that draws attention toward it, evoking awe or reverence.
    • Aura of Mystery: Observers may feel the urge to approach but sense an instinctive caution. Some may experience a slight vertigo or mental fog if they stare too long, sensing the tome’s boundless, unfathomable knowledge.
• Positives
  • Enhanced Arcane Understanding: The tome reveals knowledge of spells or rituals previously out of reach, heightening the user’s control and skill with magic.
  • Empowerment of Magical Abilities: The tome grants an expanded spell range, allowing the user to adapt spells to overcome diverse threats, anticipate obstacles, or enhance defenses.
  • Connection to Ancient Knowledge: The user feels as if they are tapping into a wellspring of history and power, gaining insight that deepens their understanding of the arcane arts and possibly aiding in future magical endeavors.
• Negatives
  • Overwhelming Psychic Impressions: The empathic resonance can be disorienting, creating intense emotional shifts or blurring the user’s sense of self. This effect may lead to periods of confusion or altered memory.
  • Magical Fatigue: The arcane energy radiating from the tome can physically and mentally exhaust the user, requiring rest afterward to fully recover.
  • Attraction of Magical Entities: Activated, the tome’s energy may draw the attention of spirits, magical creatures, or even malevolent forces sensitive to its arcane power. This can be dangerous, especially in environments where such entities are likely to dwell.

The Tome of Esoteric Lore in its activated state thus becomes a potent bridge to arcane power, enhancing the user’s abilities while linking them to ancient forces. The experience is deeply immersive, but the tome’s mysteries come with a cost, demanding resilience and caution from those who seek its wisdom.

Crafting Recipe: Tome of Esoteric Lore

• Materials Needed
  • Ancient Leather (1 cover) – Durable leather from a creature with magical origins, such as drake hide or wyvern skin, to ensure the tome’s longevity and mystical properties.
  • Arcane Ink (1 vial) – A blend of rare minerals, powdered gemstones, and enchanted plant extracts. The ink must be capable of binding magical energies to the page and maintaining the stability of arcane symbols.
  • Mystic Parchment (100 sheets) – Crafted from enchanted papyrus or treated hide, resistant to the passage of time and infused with faint arcane properties to hold powerful spells.
  • Binding Thread of Memory (1 spool) – Thread crafted from spider silk or the sinew of a magically resonant creature, imbued with trace amounts of memory-storing properties.
  • Runestone Dust (1 ounce) – Powdered dust from crushed runestones, to blend with the ink for enhancing the resonance of magical script.
  • Crystallized Essence of Knowledge (1 crystal) – This crystal is often crafted from the distilled essence of a magical or sapient creature’s memories, enhancing the tome’s ability to reveal knowledge.
• Tools Required
  • Alchemy Kit – For preparing the ink and infusing it with runestone dust.
  • Enchantment Tools – Used for imbuing the pages with magical properties, stabilizing the arcane energy within the tome.
  • Bookbinding Tools – For assembling the tome, including a bone folder, awl, book press, and needle.
  • Runic Inscriber – A tool that etches enchanted runes onto the leather cover and pages to amplify their arcane potential.
  • Memory Infuser – A specialized tool to transfer the crystallized essence of knowledge onto the pages, binding the memories and spells to the tome.
• Skill Requirements
  • Advanced Arcana Proficiency – Required to handle the enchantments and arcane binding process, ensuring that the tome holds spells without destabilizing.
  • Alchemy Knowledge – For crafting and combining the arcane ink with powdered runestones and magical herbs.
  • Enchantment Mastery – Necessary to inscribe runes and infuse spells into each page, ensuring each page can retain magical energy.
  • Bookbinding Proficiency – Basic skill in creating durable, high-quality books that can withstand both physical and magical stress.
• Crafting Steps
  • Prepare the Arcane Ink
    • Using the alchemy kit, blend rare minerals and powdered gemstones with enchanted plant extracts to create a thick, dark ink. Mix in a small amount of runestone dust to enhance its magical properties.
    • Infuse the ink with drops of magical essence, stirring with a silver rod for at least 30 minutes to allow the energy to bind fully.
  • Enchant the Parchment
    • Lay each sheet of mystic parchment in a circle of enchanted candles, casting a stabilization enchantment over them to prepare them for holding powerful spells. This process takes one hour per 20 sheets.
    • Chant a low incantation to protect the pages from deterioration over time, creating a faint aura around each page.
  • Inscribe the Runes
    • With the runic inscriber, etch ancient symbols onto the front and back cover made from ancient leather. These symbols channel the tome’s protective energies and act as conduits for the spells within.
    • The runes should be carefully traced with arcane ink, adding an additional level of protection and resonance to the tome.
  • Weave the Binding
    • Using binding thread of memory, stitch the pages together, forming signatures of about 10 pages each. Ensure each stitch is infused with intention, silently reciting a binding incantation to weave memory and knowledge into the pages.
    • Bind the signatures to the leather cover, ensuring a strong yet flexible spine.
  • Infuse the Crystallized Essence of Knowledge
    • Place the completed tome on an enchantment altar and place the crystallized essence of knowledge at its center. Using the memory infuser, transfer the essence into the pages, visualizing the memories and spells bonding to the tome.
    • This step requires focused concentration, with the caster transferring fragments of their own knowledge or memories to guide the process, anchoring the crystal’s power within the tome.
  • Final Enchantment Ritual
    • Conduct a final ritual to stabilize the arcane energy within the tome. Circle the book with infused candles or enchanted gems and chant an invocation to complete the enchantment.
    • Allow the tome to rest undisturbed for a full night within the enchanted circle, letting the energies settle and bind to each page.

Upon completion, the Tome of Esoteric Lore will be ready. This magical book now contains a vast reservoir of spells and rituals, waiting to reveal its knowledge to a worthy reader. The tome is as much a work of art as it is a tool of power, bound with care and steeped in ancient wisdom.

Tale of the Shadowed Scholar and the Tome of Lost Stars

Long ago, beyond count of moons and suns, there was a scholar of shadows named Astellens, a seeker of whispers and wanderer of the far arcane paths. It was told that Astellens wished to see beyond the stars and taste of the knowledge forbidden, knowledge lost when the world was still young and magic but a child. For many days and nights, he walked the edge of twilight, gathering secrets that slipped like smoke from between the fingers of wise ones.

In that age of dim light and ancient stone, Astellens crafted a book—a book, it is said, woven from words that were not words, from secrets that hid from the sun. This was the Tome of Lost Stars, made not by hand, but by thought, by whispers and breath stolen from forgotten places. Its pages were neither plant nor beast but were thought to be woven from threads of shadow and stars’ dust, bound with leather cured under noonday moonlight.

They say the tome would show one page to each who read, and yet to the same reader, it would appear a thousand times in a thousand ways. Astellens, filled with thirst for its endless well of knowledge, grew thin and weary, for the book had no end, and each answer it gave was but a question in disguise. For in his heart, the tome took root like a seed, growing thirst as it gave, casting a shadow over Astellens’ mind as he sought ever deeper secrets.

Then came the night when Astellens spoke to the stars. They listened but gave no voice in return. Frustrated, he called upon powers ancient and nameless, asking why knowledge slipped from his grasp like sand. The stars flickered in answer, and the winds blew as though to laugh. But Astellens heard a voice in that night wind, soft and quiet, the voice of the book itself, for it had learned to speak in his own tongue. It whispered: “The deeper you reach, the more shadows you hold; the more shadows you hold, the more light you lose.”

Astellens grew silent, yet his heart grew no lighter. Instead, he sealed the tome, binding it in words of his own sorrow, and hid it deep beneath stone and spell. There it lay hidden, unbreathed by man nor beast, until the ages turned, and new seekers came, their minds like young stars, reaching out for the same light that had once bound Astellens.

Some say the tome waits for those with the wisdom to ask not “what” but “why,” for it is not words nor power but the question that holds true knowledge. The Tome of Lost Stars became the Tome of Esoteric Lore, and through whispers and tales, it passed hands many times. Its stories grew older as its pages remained young, and each seeker who found it left some small piece of themselves within its pages.

Moral of the Story: True wisdom is not in answers but in the questions we carry, for the deepest knowledge is a shadow that ever grows as we chase the light.

Suggested conversions to other systems:

Call of Cthulhu (7th Edition)

Tome of Esoteric Lore

• Type: Artifact / Mythos Tome
• Languages: Eldritch Script, Deciphered by an INT x4 Roll (5 hours of study)
• Mythos Knowledge: +4% to Cthulhu Mythos skill upon completion of study
• Sanity Loss: 1D3/1D6 upon first study
• Spell Insights: Upon completing study, the reader learns 1D4 random spells or rituals (keeper’s discretion).
• Mechanics:
  • Unending Knowledge: Prolonged study of the tome allows the user to increase Cthulhu Mythos by 1% per 5 hours spent reading (limit 4% total).
  • Whispered Warnings: If read at night, the user may hear faint whispers, giving them a warning of supernatural danger within the next 24 hours (INT x2 roll).
• Drawback: Continuous reading leads to a slow decline in mental stability, with an additional 1D3 Sanity loss for every additional 5 hours studied beyond the first.

Blades in the Dark

Tome of Esoteric Lore

• Type: Fine Item (Arcane Tome)
• Load: 1 (Light Item)
• Quality: Tier III (Extremely Rare)
• Effect: Grants temporary or unique arcane abilities through study.
• Mechanics:
  • Arcane Study: When in possession of the tome, the user may gain a +1d on any Attune or Study roll involving occult or forgotten knowledge, once per downtime session.
  • Insight into Mysteries: With each serious study (Downtime Action), the player rolls Study. On a 6, they gain access to a unique ritual or an ancient magical technique, useful until the next downtime.
• Mental Toll: Prolonged study causes the character to mark a Trauma after three successful downtime studies using the tome, representing the price of forbidden knowledge.

Dungeons & Dragons (5th Edition)

Tome of Esoteric Lore

• Wondrous Item, Very Rare (requires attunement by a spellcaster)
• Stats:
  • Casting Insight: While attuned, the tome allows the user to cast an additional spell of their choice from any spell level they can cast. This spell is chosen during a long rest and can be changed when leveling up.
  • Arcane Knowledge: The tome provides advantage on Arcana checks regarding spells, ancient magic, or magical creatures.
  • Forbidden Knowledge: The user gains the ability to cast Legend Lore once per long rest without material components.
• Drawback:
  • Whispers of the Tome: Prolonged study (more than 1 hour at a time) forces a DC 15 Wisdom saving throw. On a failure, the user suffers from lingering confusion or paranoia, resulting in disadvantage on Wisdom saving throws until their next long rest.

Knave

Tome of Esoteric Lore

• Type: Arcane Book
• Defense Modifier: None
• Inventory Slots: 1
• Rarity: Rare (can be found in ancient or arcane locations)
• Special Abilities:
  • Spell Insight: Once per day, the user can choose one spell they have prepared and cast it without expending its spell slot. This choice must be made at the start of the day, reflecting study and meditation upon the tome’s contents.
  • Secret Knowledge: The tome grants a +2 bonus to any roll involving Arcane, Lore, or Occult knowledge when consulted, as the tome’s information aids with answers or insights.
• Drawback: After intense study (more than 10 minutes), the user must succeed on a Wisdom check or become confused, requiring 1d4 rounds of rest to refocus before casting spells or interacting with others effectively.

Fate Core

Tome of Esoteric Lore

• Item Type: Arcane Artifact
• Aspect: “Boundless Knowledge, Forbidden Power”
• Refresh Cost: 1 Refresh (if using for balance)
• Stunts:
  • Whispered Secrets: Once per session, the user may invoke the tome’s aspect to gain +2 on any roll involving occult knowledge or ancient magic.
  • Unveiling Mysteries: For 1 Fate Point, the user can temporarily gain access to a new spell or ritual as a bonus stunt. This spell can be used once and fades afterward, symbolizing the tome’s fleeting insights.
  • Maddening Insight: The GM may compel the tome’s aspect to cause the user a moment of confusion or obsession, such as hearing whispering voices or becoming temporarily lost in thought. The character gains a Fate Point for enduring this distraction.
• Drawback:
  • Mental Strain: Each time the tome’s magic is accessed, the user takes on a Mild Consequence (e.g., “Haunted by Secrets” or “Overwhelmed by Arcane Whispers”) due to the mental toll of absorbing so much knowledge.

Numenera / Cypher System

Tome of Esoteric Lore

• Level: 6
• Rarity: Very Rare
• Cost: 20 Intellect Points per use (or equivalent in the GM’s discretion)
• Properties:
  • Ancient Arcana: The user gains an asset on Intellect-based tasks involving lore, history, or magic for the day after reading.
  • Spellcasting Knowledge: Once per session, the user can cast any one spell or effect of Level 4 or lower as though they know it (using intellect pool cost).
  • Ephemeral Insight: The tome offers fleeting glimpses of wisdom. The user gains a +1 to Intellect Edge for one hour after studying the tome.
• Drawback:
  • Knowledge Drain: Each time a spell or insight is used, the user suffers 2 points of Intellect damage as they mentally process the tome’s overwhelming content. This damage bypasses armor and cannot be mitigated.

Pathfinder (2nd Edition)

Tome of Esoteric Lore

• Item Level: 8
• Type: Wondrous Item (consumable if desired)
• Price: 1,000 gp
• Rarity: Rare
• Effects:
  • Arcane Insight: The tome grants a +2 circumstance bonus on Arcana checks when researching or identifying ancient or magical lore.
  • Spell Access: Once per day, the user can prepare or cast an additional spell of a level they can cast, selected from any arcane tradition.
  • Unveiled Secrets: With 10 minutes of reading, the tome allows the user to cast Augury or Comprehend Languages once per day without consuming a spell slot.
• Drawback:
  • Psychic Echoes: After each use, the user must succeed at a DC 17 Will save or become Frightened 1 for 1 hour, experiencing unsettling memories of past owners or hearing faint, unsettling whispers from the tome.

Savage Worlds (Adventure Edition)

Tome of Esoteric Lore

• Type: Arcane Relic
• Rarity: Legendary
• Value: $1,500
• Special Abilities:
  • Arcane Scholar: The tome grants a +2 to Research rolls involving magic or occult knowledge.
  • Spell Repertoire: Once per day, the user can choose any one spell from the core spell list and cast it as though they knew it. This spell is cast at no Power Point cost but has -1 to Trait rolls as it draws deeply from the user.
  • Eldritch Wisdom: The tome allows the user to ignore the normal penalties for unskilled rolls related to Arcane Knowledge, treating these as basic knowledge if consulted.
• Drawback:
  • Mind Fatigue: Using the tome’s magic requires a Spirit roll (DC 4). On a failure, the user takes a level of Fatigue due to mental strain, which can be removed with one hour of rest.

Shadowrun (6th Edition)

Tome of Esoteric Lore

• Type: Rare Magical Artifact
• Rating: 3 (Arcane Lore)
• Availability: 15R (Restricted)
• Cost: 25,000¥
• Effects:
  • Arcane Knowledge: Grants +2 dice pool bonus to Arcana and Astral Perception tests when the tome is consulted (requires 1 minute of reading).
  • Mystic Spell Access: Once per day, the tome grants access to a spell outside the user’s known spells for 24 hours (maximum spell Force equal to user’s Magic Rating). The spell fades from memory after that period.
  • Whispers of the Beyond: If the user spends more than 2 hours studying the tome, they gain a +1 bonus to Intuition rolls for 24 hours as they gain fleeting glimpses of hidden truths.
• Drawback:
  • Mental Strain: Studying the tome for more than 1 hour requires a Willpower + Intuition (3) test. On a failure, the user takes 2 Stun Damage due to psychic overload and gains -1 dice on all Arcana-related rolls until they rest.

Starfinder

Tome of Esoteric Lore

• Item Level: 7
• Type: Magic Item (Wondrous Item)
• Price: 7,500 credits
• Usage: 1/day
• Bulk: 1
• Effects:
  • Arcane Insight: Grants the user a +2 insight bonus on Mysticism checks related to arcane or ancient knowledge.
  • Spell Expansion: Once per day, the tome allows the user to cast one additional spell of any level they can cast without expending a spell slot. This spell must be chosen from the arcane spell list and requires 10 minutes of preparation.
  • Eldritch Protection: The user gains a +1 insight bonus to AC for 1 hour after a study session (at least 10 minutes) with the tome.
• Drawback:
  • Psychic Feedback: Each time the spell expansion ability is used, the user must make a DC 17 Will saving throw. On a failure, they become shaken for 1 hour, experiencing an unsettling mental strain.

Traveller (Mongoose 2nd Edition)

Tome of Esoteric Lore

• Type: Arcane/Ancient Technology (TL 15 equivalent)
• Armor: None (but grants mental fortitude)
• Cost: 1,000,000 credits
• Encumbrance: 2 kg
• Effects:
  • Arcane Scholar: Provides +2 DM on Science (Arcane) or Mysticism checks when consulting the tome.
  • Mystic Spell Access: Once per day, the user may cast a spell (chosen by the GM based on the tome’s contents) as if they possessed that spell’s training. This spell is cast using an INT 10+ check for success, and cannot be cast again without re-reading the tome.
  • Visionary Insight: Consulting the tome for 1 hour grants the user +1 DM to Intelligence checks for the next 24 hours.
• Drawback:
  • Psychic Turmoil: Prolonged study (more than 1 hour) requires an INT 8+ check or the user suffers a -1 DM on all skill checks for the next 8 hours due to mental fatigue.

Warhammer Fantasy Roleplay (4th Edition)

Tome of Esoteric Lore

• Type: Arcane Tome (Magical Item)
• Encumbrance: 1
• Rarity: Very Rare
• Cost: 150 Gold Crowns
• Special Qualities:
  • Esoteric Arcana: Grants a +10 bonus to Lore (Magic) and Language (Arcane) tests while using the tome.
  • Spell Augmentation: Once per day, the tome allows the user to cast a known spell with +1 SL (Success Level) or -1 miscast risk.
  • Forewarning of Perils: Studying the tome for at least 30 minutes grants +1 to Perception tests for the remainder of the day as the user perceives subtle shifts in magic or danger.
• Drawback:
  • Mind’s Burden: Extended study (over 1 hour) inflicts a Challenging (+0) Willpower Test to avoid a temporary Psychology Condition such as Fear or Paranoia for the next hour, reflecting the tome’s toll on the mind.