In the works for next version:
New mutation categories:
Flea: Similar to tardigrade, but higher physical defense, less tolerance of environmental extremes, fast moving, stronger attack, only eats/drinks blood.
Medusae: Not a snake-haired gorgon, but a deadly venomous jellyfish, one of only a few species in the world capable of directly killing a healthy adult human. Squishy and slow, but basically immune to injury and pain, while unarmed attacks inject enemies with a deadly venom that causes damage + unbearable pain.