Joy Mutant (5e Creature)
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Large humanoid, any alignment
Saving Throws Dex +7, Wis +5
Legendary Resistance (3/Day). If the mutant fails a saving throw, it can choose to succeed instead.
Regeneration. The mutant regains 15 hit points at the start of its turn. If the mutant takes fire or necrotic damage, this trait doesn't function at the start of the mutant's next turn. The mutant dies only if it starts its turn with 0 hit points and doesn't regenerate.
Multiattack. The mutant makes three attacks: one with its bite and two with its claws.
Bite. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) piercing damage.
Claw. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 11 (2d6 + 4) slashing damage.
Fatal Chomp (Recharge 6). Melee Weapon Attack +9 to hit, reach 5 ft., one creature. Hit: 22 (4d8 + 4) piercing damage. If this damage reduces the target to 0 hit points, the mutant bites off one of the creature's heads. The creature dies if it can't survive without the lost head. A creature is immune to this effect if it is immune to slashing damage, doesn't have or need a head, has legendary actions, or the GM decides that the creature is too big for its head to be bitten off.
The mutant can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The mutant regains spent legendary actions at the start of its turn.
Bleed. The mutant coughs up blood and takes 7 (2d6) necrotic damage. This damage cannot be reduced or avoided by any means. The mutant gains advantage on the first attack roll it makes before the end of its next turn and can roll one extra damage die with that attack.
Joy mutants are mindless creatures that have been mutated horrifically from their previous addiction to the drug "Joy". They still possess sentience and sapience, although their form being completely changed from their previous humanoid bodies causes them to act and move in large bursts of energy, fueled by mental anguish, as their bodies don't experience any pain. These creatures are ruthless killers, attacking any living being they come across, hoping to find any more Joy to take in to soothe their mental pain. However, some of these creatures are able to soothe their anguish and pain and act as normal humanoids, or how they acted previously to this affliction. However, if time goes on too far, they may lose themselves to the never ending migraine that is being a Joy mutant.