Bioforged

"I am my greatest invention—and my gravest mistake."
-Dr. Henry Jekyll

 While many artificers create mechanical marvels, you chose a darker path: the path of internal augmentation. As a Bioforged artificer, you have studied the limits of physiology, arcane biology, and volatile chemistry—not to heal, but to evolve. Through calculated self-experimentation, you have unlocked a method to trigger a monstrous transformation, temporarily unleashing your mind’s brilliance through terrifying physical power.

This change is not the result of an elixir or mechanical implant, but a neurological failsafe, buried deep within your own nervous system. Your mind remains sharp, your intentions intact—but your body becomes a weapon.

Whether your transformation is the result of science gone too far, or a desperate attempt to protect others at great cost to yourself, your Mutated State is as much a curse as it is a gift.

Monstrous Proficiency

3rd-level Bioforged feature

You gain proficiency in the Intimidation skill and heavy armor. You ignore the speed reduction for armor that you are proficient with.

Bioforged Spells

3rd-level Bioforged feature

You always have certain spells prepared after you reach particular levels in this class, as shown in the Battle Smith Spells table. These spells count as artificer spells for you, but they don’t count against the number of artificer spells you prepare.

Bioforged Spells

Artificer Level	Spell
3rd	heroism, thunderwave
5th	enhance ability, mirror image
9th	haste, fear
13th	greater invisibility, stoneskin
17th	hold monster, wall of force

Controlled Mutation

3rd-level Bioforged feature

You gain the ability to undergo a terrifying transformation.

As a bonus action, you can enter a Mutated State, which lasts for 1 minute. You can use this feature a number of times equal to your proficiency bonus, regaining all expended uses on a long rest.

While in your Mutated State:

• You may use your Intelligence modifier in place of Strength for:

  • Melee and Thrown weapon attack and damage rolls.

  • Strength Saving Throws

  • Athletics checks.

  • Grapple and shove attempts.

• You gain temporary hit points equal to 1d8 + your Artificer level at the start of the transformation.

• Once per turn when you hit with a melee attack, you can deal additional force damage equal to your Intelligence modifier (minimum 1).

Mutated State Flavor Table

Your transformation is unique to you. When you enter your Mutated State, consider how it manifests. You can roll on the table below or choose an option that fits your character.

Extra Attack

5th-level Battle Smith feature

You can attack twice, rather than once, whenever you take the Attack action on your turn.

Enhanced Mutation

9th-level Bioforged feature

Your transformation becomes more powerful. Choose one of the following Mutated Adaptations, which you gain while in your Mutated State:

• Carapace Hide

• Overcharged Muscles

• Predator’s Instinct

You may switch to a different adaptation each time you enter your Mutated State.

Carapace Hide

9th-level Bioforged feature

Carapace Hide: You gain resistance to bludgeoning, piercing, and slashing damage from nonmagical attacks.

Overcharged Muscles

9th level Bioforged feature

Overcharged Muscles: Your jump distance triples, and your movement speed increases by 15 feet.

Predator's Instinct

Level 9 Bioforged feature

Predator’s Instinct: You gain darkvision 60 ft (or increase existing darkvision by 60 ft), and you have advantage on Perception checks relying on hearing or smell.

Unleash the Monster

15th-level Bioforged feature

You can fully let go and become a force of devastating intellect and fury.

As a bonus action while in your Mutated State, you can unleash your full transformation until your Mutated State ends. During this time:

• You gain advantage on all Strength-based and Intelligence-based ability checks and saving throws.

• Your carrying capacity is doubled.

• When you are reduced to 0 hit points, you can instead drop to 1 hit point. This can happen once per transformation.

• Each attack you make deals an extra 2d6 damage on hit.

• Your melee weapon attacks score a critical hit on a roll of 19 or 20.

This can be used once per long rest, and you may expend a spell slot of 3rd level or higher to use it again.