Feral Human (5e Creature)
From D&D Wiki
Medium humanoid (human), chaotic evil
Club. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d4 + 3) bludgeoning damage.
Humans gone more than mad, as their minds are effectively gone and nothing is left of them but an urge to kill anything that moves. They hate and despise ordinary humans, as they remind them of what they once were, and what they have become.