Forgotten Lore: The Celtic Grimoire

Welcome, Adventurer

Step Into the Myths of Celtic Magic

The Celtic Grimoire is an invitation to immerse yourself in a world of ancient power, sacred rituals, and the living legacy of myth. This book redefines what magic can be at the table, drawing from the rich traditions of the Celts to craft a brand new spellcasting system that feels alive.

Through over 150 pages of meticulously written lore, mechanics, and narrative tools, this Kickstarter exclusive book is built to inspire. Whether you’re a spellcaster shaping unique magic or a GM creating a world filled with wonder and danger, this book brings authenticity, depth, and creativity to your campaigns.

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Magic Woven from Myth and Legend

Celtic magic is woven from story, ancestry, and the land itself. Every spell in the Celtic Grimoire carries history, shaped by the forces that govern life, death, and the unseen. When you invoke a spell, you are calling upon the weight of generations, drawing power from the spirits of those who walked before you.

To summon Morrigan’s Veil is to shroud yourself in the essence of war and fate, the whispers of ancient battlefields rising around you. To kindle Brigid’s Hearthfire is not just to heal, but to carry forward the sacred flame that has burned since time immemorial. Here, magic is alive - it is felt, feared, and honored.

A New Approach to Spellcasting

Magic should be more than a set of rules on a page. It should breathe, shift, and demand something of those who dare to wield it. In the Celtic Grimoire, spellcasting is not a cold, predictable system - it is wild, ritualistic, and deeply tied to the world itself.

A spell does not exist in isolation. It is shaped by the caster’s ancestry, the alignment of the stars, the presence of sacred sites, and the offering of blood or fire. Some magic grows in power when spoken at dusk beneath an ancient oak. Other spells demand a price - a sacrifice of health, a vow whispered under moonlight, a binding that cannot be undone. Magic in this world is not something to be controlled - it is something to be respected.

What Makes This Book Essential?

1. It Transforms Magic Into Myth

This book redefines how magic feels at the table. Every spell in the Celtic Grimoire is infused with history, myth, and consequence. Instead of just dealing damage or healing wounds, spells carry weight, demand offerings, and shift with the world around them. When you cast, you’re not just choosing a mechanic - you’re invoking ancient forces.

1. It Brings Magic to Life in New Ways

The Celtic Grimoire introduces dynamic spellcasting mechanics that go beyond the standard 5e system. Magic grows stronger during seasonal rites, interacts with sacred sites, and shifts depending on ancestry. The book introduces Ogham runes, ancestral boons, and ritual casting that rewards immersion, making every spell an experience.

1. It’s Both a Player and GM Resource

This is a tool for storytelling. Players can create deeper, more immersive characters, while Game Masters can use these mechanics to shape their world. Whether you need an ancient ritual  or a location tied to magic, this book has you covered.

1. It Elevates Worldbuilding and Roleplay

Rather than just being a list of spells, the Celtic Grimoire offers a fully realized system of magic that makes the world feel more real. Magic is tied to sacred places, forgotten rites, and mythic forces. Even low-level spells feel significant, making every casting a choice that can shape the story.

1. It’s Forgotten Lore’s Most Ambitious Project Yet

This isn’t just another supplement - this is the first physical release from Forgotten Lore, a book designed to be as beautiful as it is functional. Whether you’re a player, a GM, or a collector, this book is crafted to feel like an artifact of legend, something you’ll return to for years to come.

If You Want Magic That Feels Powerful, Ancient, and Alive - This Book Is Essential.

Unique Spells

Over 200 Unique Spells

From ancestral boons to fate-twisting Wyrd magic, every spell is crafted to reflect the themes of Celtic mythology. The 200+ spells within the Celtic Grimoire are tied to history, myth, and the living energy of the world itself. These spells don’t exist in isolation - they are shaped by ancestry, environment, offerings, and sacred rites. They evolve. They demand respect. They carry weight beyond the moment of casting.

Each spell in this book is designed to make magic feel wild, ritualistic, and bound to something greater than the caster. Fire doesn’t just burn - it consumes in accordance with ancient laws. Storms don’t just strike - they answer the will of those who honor them. The dead don’t just whisper - they demand something in return.

A Glimpse at the Magic Within…

• Nature’s Wrath: The land itself awakens, tearing apart foes with spells like Sunder Earth and Stormcall.
• Spirit Communion: The dead whisper secrets, and the veil between worlds thins with spells like Whispers of the Fallen and Call of the Cauldron.
• Sidhe Enchantment: The magic of the fae is beautiful and treacherous - glamours, illusions, and bargains written in spells like Fae’s Lure and Phantom Revel.
• Ancestral Protection: Lineage is power. Bloodline’s Oath and Echo of the Clan let you call upon the strength of those who came before.
• Morrigan’s Shadow: The magic of war, death, and fate. Invoke Morrigan’s Veil or mark an enemy with Doomspeaker’s Curse.
• Elemental Bond: Fire, water, earth, and air obey those who understand their sacred balance - wield Brigid’s Hearthfire or the Wellspring of Renewal.
• Fey Wilds: Magic without logic, untamed and strange. One spell may bless, another may twist fate itself - step carefully with Wyrdshift and Hedge Maze.
• Land Oath: The power of standing stones, ancient forests, and forgotten places - bind yourself to the wild with Sacred Grove’s Blessing.
• Forests’ Breath: The magic of beasts, trees, and whispered druidic secrets - Heart of the Stag and Whispering Canopy let the land speak through you.
• Oak and Iron: The strength of runes, metal, and ancient sigils - Binding Chains and Sigil of the Warrior bring old symbols to life.

These are just a few of the spells waiting within the Celtic Grimoire - a collection of raw, mythic, and immersive magic that transforms spellcasting into something more than words and gestures.

Are you ready to weave fate, awaken the land, and call upon the power of the old gods?

8 Thematic Chapters

Each chapter of the Celtic Grimoire explores a fundamental aspect of Celtic magic, ensuring that spells feel deeply connected to lore, the world, and the forces that shape them. This book reimagines what it means to be a spellcaster, offering a living, evolving system of magic.

• Introduction to Spellcraft: Discover what makes Celtic magic unique, from its deep ties to nature and ancestry to the powerful consequences that shape every spell.
• The Nature of Celtic Spellcraft: Magic is not just learned - it is the breath of the world itself. This chapter explores the forces of the land, the spirits, and fate that influence every incantation.
• Rites and Rituals: True magic requires more than words. Learn how seasonal rites, sacred sites, and ceremonial offerings amplify spells and bring greater power at a cost.
• Ancestral Spellcraft Traditions: Some spells are not yours alone - they are inherited. Call upon the power of divine and mythic bloodlines, binding yourself to ancient oaths and forgotten gods.
• Ogham and Runes Mechanics: The written word carries power, but Ogham is something more. Learn the art of rune-carving, unlocking spell enhancements, stored magic, and hidden knowledge etched in stone and wood.
• Custom Spell Creation Rules: Magic should feel as unique as the character who wields it. This chapter provides rules for crafting spells that evolve, react to the world, and carry deep personal significance.
• Folk Tales and Mythic Inspirations: Every spell has a story. Dive into Celtic myths, legendary figures, and ancient tales, transforming them into powerful spells, NPCs, and adventure hooks.
• Spellcasting Consequences: Magic is never without risk. This chapter introduces systems of balance, unforeseen magical side effects, and world-altering repercussions, making every casting a choice with weight.

Each chapter builds upon the last, crafting a fully realized vision of Celtic magic that is immersive, dangerous, and deeply rooted in myth.

This opening chapter sets the stage for the magical journey ahead, explaining what makes Celtic spellcasting distinct from traditional systems. Magic is an extension of the natural and spiritual forces surrounding the caster. From the cycles of the seasons to the whispers of the Otherworld, this chapter explores the rich context in which magic operates. Players will learn how Celtic traditions of ancestry, myth, and land shape every spell and action, offering a grounded and personal approach to magic.

Celtic magic is as much about harmony as it is about power. This chapter delves into the foundations of spellcasting, focusing on the elemental forces, ancestral bonds, and spiritual connections that define the craft. It introduces the themes of balance and consequence, showing how casters must align themselves with the natural world and respect the forces they wield. Mechanics like environmental modifiers and natural amplifications are presented, encouraging players to interact with their surroundings for enhanced effects.

Rituals lie at the heart of Celtic magic, acting as bridges between the mortal and the divine. This chapter provides detailed rules and lore for performing sacred rites tied to seasonal festivals like Samhain and Imbolc, sacred sites like stone circles and wells, and powerful oaths that bind magic to purpose. Each ritual offers unique mechanical benefits, such as amplifying spells or unlocking temporary boons. The chapter also introduces celestial and ancestral rites, encouraging players to create dramatic and meaningful moments in their campaigns.

Ancestry is more than lineage - it is a source of power, duty, and identity. This chapter explores how Celtic spellcasters draw on the strengths of their bloodlines, with specific ancestries tied to deities like the Morrigan, Dagda, Brigid, and Lugh. Each lineage offers unique abilities, spell enhancements, and narrative hooks, reflecting the traits and struggles of their divine or mythic origins. Players are encouraged to embrace the challenges of their ancestry, from proving their worth to fulfilling ancient oaths, making magic a deeply personal experience.

This chapter introduces Ogham, the sacred Celtic script, as a central element of spellcasting. Players learn how to carve, inscribe, or draw runes onto physical mediums like bark, stone, or weapons to amplify their magic. Each rune carries unique effects tied to natural forces, such as increased spell potency, extended durations, or added environmental interactions. The chapter also includes environmental resonance mechanics, showing how runes interact with sacred sites, ley lines, and celestial events to create dynamic and immersive gameplay.

Forge your own magic with detailed guidelines for creating unique spells that feel authentically Celtic. This chapter walks players through the process of blending mechanics and narrative, integrating elements like rites, runes, and ancestral influences. From crafting transformative spells tied to specific seasons to weaving environmental effects into your magic, the rules empower players to make spells that reflect their character’s story. Example spells, modifiers, and balancing tips ensure that custom creations are both flavorful and mechanically sound.

Celtic mythology is a treasure trove of inspiration, and this chapter highlights the stories that shape spellcasting traditions. From the Salmon of Knowledge to the Silent Hosts, each tale offers not only rich lore but also gameplay mechanics and roleplaying opportunities. Players can incorporate these myths into their characters’ backstories, unlock spell effects tied to legendary figures, or embark on quests inspired by forgotten legends. This chapter breathes life into campaigns, connecting players to the living world of myth and magic.

In Celtic magic, power always comes with a price. This chapter explores the risks and rewards of wielding magic, introducing systems for spellbacklash, overcharging spells, and environmental consequences. Casters who push their limits may experience strange side effects, draw the attention of otherworldly forces, or even scar the land they seek to protect. These mechanics add depth and tension to gameplay, ensuring that every spell carries narrative weight. Examples of lasting consequences and redemption arcs provide inspiration for both players and GMs.

PRINTING & FULFILLMENT

For the first time ever, a Forgotten Lore title will be available in physical format! The Celtic Grimoire marks a historic moment for this beloved series, bringing the rich magic and mythology of Celtic spellcasting into your hands in a beautifully crafted physical edition.

• Measures 8.5"x11"
• Full colour interior pages
• Over 150 pages
• POD available in softcover or hardcover

Print on Demand Discount Code for Drivethru RPG:  Receive a discount code for a Print on Demand version of the Celtic Grimoire through DriveThruRPG. We offer backers of this tier access to order the physical copy of this book directly through Drivethru RPG - this allows us to keep our costs low, and in turn, keep costs lower for you by buying the book at cost + shipping.

You will be required to pay seperately for printing and shipping at a future date with Drivethru RPG once the book is available.

IMPORTANT: Backers will receive at-cost codes to purchase printed books directly from DriveThruRPG once print proofs are approved. The estimated cost is approximately €10 for a softcover and €15 for a hardcover, plus shipping fees, which backers will cover at the time of purchase.

Thanks to their worldwide printing and delivery services, you will benefit from competitive shipping rates. More info on their delivery rates can be found here.

Pledge Levels

Unlock the Magic

For those eager to harness the power of ancient Celtic spellcraft, this pledge grants you the Celtic Grimoire in PDF format. Whether you're a player looking for immersive new spells or a GM seeking to bring Celtic myth to life, this digital edition gives you instant access to:

• 200+ original spells inspired by ancient Celtic magic.
• Unique mechanics like ancestral boons, runic enhancements, and sacred rites.
• A fully designed spellcasting system that integrates seamlessly with 5e.
• Expansive lore and storytelling tools to enrich your campaign.

Perfect for those who want a portable, searchable, and easy-to-use reference at their table!

A Book of Power in Your Hands

Take your place as a true guardian of forgotten magic with the Celtic Grimoire PDF plus a Softcover Print-on-Demand (POD) code via DriveThruRPG.

This means you can order a softcover print copy at cost, making it easy to hold this mystical tome in your hands. Immerse yourself in the spells, lore, and mechanics of the Celtic Grimoire in a beautifully crafted physical edition - perfect for flipping through during play or displaying on your gaming shelf.

• Digital + Physical: Get both the PDF and the ability to print your own book.
• Affordable Physical Copy: The POD code lets you print the book at cost through DriveThruRPG, so you control the final price.
• Softcover Format: A flexible, high-quality edition ideal for table use.

For those who love the feel of a real book at the table, this is the perfect choice!

A Tome Worthy of Legends

Legends deserve a book that stands the test of time. With this pledge, you receive the Celtic Grimoire PDF plus a Hardcover Print-on-Demand (POD) code via DriveThruRPG, allowing you to print a premium hardcover edition at cost.

• Durable & Beautiful: The hardcover format ensures your grimoire remains intact through years of gaming.
• Digital + Physical: Enjoy the instant accessibility of the PDF and the immersive experience of a real book.
• Collector’s Edition Feel: A striking hardcover edition that looks great on your shelf or gaming table.

This is the ultimate choice for those who love collecting high-quality RPG books or want a durable reference for frequent play.

Master the Forgotten Lore

For those who seek the full breadth of Forgotten Lore, this pledge grants you the Celtic Grimoire PDF plus every Forgotten Lore PDF released to date - a vast collection of mystical, mythic, and magical content for TTRPGs. 

Check out all of our previous Forgotten Lore projects here!

• Unlock an entire library of unique RPG content, packed with worldbuilding, mechanics, and powerful spells.
• Expand your storytelling tools with additional Forgotten Lore supplements, adding new magical concepts, creatures, and settings.
• Instant Digital Access: No waiting - download everything as soon as it’s ready!

If you're a GM looking to build a world steeped in Celtic and mythic magic or a player who loves deep, lore-rich content, this pledge gives you an entire archive of Forgotten Lore to inspire your next campaign.

A Legacy of Magic

The ultimate package for true scholars of Celtic magic and Forgotten Lore, this pledge grants you everything:

• The Celtic Grimoire PDF
• Every Forgotten Lore PDF released to date
• A Print-on-Demand (POD) code for either the Softcover or Hardcover edition via DriveThruRPG

Check out all of our previous Forgotten Lore projects here!

This means you get both the digital and physical versions, ensuring you have the complete experience:

• Instant PDF access for ease of use at the table.
• Choose between Softcover or Hardcover POD to print your own book at cost.
• The ultimate Forgotten Lore collection, packed with content that enhances worldbuilding, spellcasting, and storytelling.

This pledge is for those who want it all - the full depth of Celtic magic, a complete archive of Forgotten Lore, and a tangible grimoire to bring to the table.

Add-ons: Celtic TTRPG Projects

All of our previously funded Celtic TTRPG Projects are available to purchase as an add-on. This comprehensive collection is a treasure trove for fans and new explorers alike, providing a complete experience of our Celtic-themed world.

Check out our previous projects below!

Eclipse of the Sun: 

A three session DND 5e campaign, set in a rich and detailed Celtic world, designed to be played by a party of four to five adventurers of levels 3-6.

Eclipse of the Sun - Kickstarter Page

Celtic Collections:  

A system neutral Celtic source book: 100 one-page Locations, NPCs, Weapons & Armour, Magic Items and Spells for TTRPG and World Building.

Celtic Collections - 100 System neutral Celtic Locations, NPCs, Weapons & Armour, Magic Items and Spells

Celtic Adventures: 

A compendium of 150 Celtic adventure and quest ideas, weaving ancient myths into epic tabletop adventures.

Celtic Adventures - 150 Celtic themed quest ideas

Celtic Chronicles: 

A 5e source book including Classes, Quests, Locations & Lore inspired by the dark history of Irish and Celtic folklore.

Celtic Chronicles - 120 page Sourcebook with two unique classes

Celtic Monstrosities: 

A 5e bestiary of ancient and evil beasts and monsters, inspired the dark history of Irish and Celtic folklore.

Celtic Monstrosities - 80 pages of monsters, creatures & beasts

Why This Project Matters + Thank You

Celtic mythology has influenced so many modern fantasy worlds, but it’s rarely explored in its full depth and complexity. The Celtic Grimoire aims to change that. This is a way to honor these stories, bringing them into your games in a way that feels authentic and engaging.

Every spell cast, every story told, and every world built starts with the people who believe in them. Your support brings The Celtic Grimoire to life, transforming it from an idea into something that players and GMs can truly experience. Whether you’re here for the deep lore, the immersive mechanics, or the sheer love of Celtic mythology, you are a part of this journey. Thank you for helping make this book a reality—this wouldn’t be possible without you!