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Welcome to The Aberrant Codex: Mutations and Aberrations, your ultimate guide to the bizarre, the corrupted, and the unknowable in your 5E campaigns. This manual takes you deep into the world of aberrations, eldritch forces, and mutation-infested lands - offering a massive arsenal of creatures, character options, and mechanics to twist your stories into something truly unforgettable.

What’s Inside?

Aberrations and Mutations Explored: Unravel the mysteries of beings that defy logic and biology - tentacled horrors, malformed beasts, and sentient anomalies that warp the fabric of reality. Learn how exposure to unstable magic, alien realms, or cosmic influence can twist creatures into terrifying new forms.

Rules for Mutation and Mutation Zones: Create wild regions saturated with arcane fallout, psionic radiation, or eldritch corruption. Includes rules for temporary and permanent mutations that reshape monsters and characters alike, and guidelines for using these zones as story-driving elements in your world.

Character Options:

  • 10 Backgrounds: From eldritch survivors to warped cultists, embody those who have been forever changed by contact with the abnormal.
  • 12 Subclasses: Tap into alien instincts, mutate your body into a weapon, or wield the chaotic powers of the void with a wide array of strange and powerful subclass paths.
  • 4 New Races: Play as beings touched by planar energies, mutated by magical exposure, or born of aberrant lineage.
  • 30 New Feats: Further customize your character with options that reflect physical changes, mental evolutions, or strange symbioses.

Spells and Magic Items:

  • 33 Spells: Cast unstable rays, transmute flesh, unleash mutagenic energies, or summon eldritch beings.
  • 80+ Magic Items: From mutating weapons to strange relics grown in alien cocoons, each item brings new horror - and possibility - to your table.

Monsters and Mutants:

  • 150+ Aberrant and Mutated Creatures: A full bestiary of nightmares, including corrupted wildlife, psionic predators, cosmic intruders, and mind-breaking horrors.
  • Variant Mechanics and Mutated Templates: Add random or themed mutations to existing monsters for endless combinations of terror.

VTT Resources:

  • 100+ Creature Tokens to bring your mutant nightmares to life on any virtual tabletop.
  • 125+ Art Handouts to immerse your players in the twisted beauty of the aberrant world.

spells magic item 
maw of insanity whimz'orr 
Ancient Chimera Three-Headed Ettin

Dare to embrace the strange, the twisted, and the unclassifiable. The Aberrant Codex is your key to exploring the monstrous beauty of mutation, the madness of aberrations, and the fragile limits of reality itself.


The Hardcover edition of The Aberrant Codex is available here: https://buy.stripe.com/8x24gyfNNegY75qgwI6c005

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Buy Now$29.99 USD or more

In order to download this book you must purchase it at or above the minimum price of $29.99 USD. You will get access to the following files:

The Aberrant Codex - Mutations and Aberrations.pdf 177 MB
The Aberrant Codex_ Mutations and Aberrations - UNCOMPRESSED - best for compatibility issues.pdf 553 MB
Art Handouts.zip 480 MB
VTT Tokens.zip 42 MB

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The Aberrant Codex - Mutations and Aberrations (Preview).pdf 21 MB

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