Mutants are a creature type spanning Magic's Simic experiments and several Universes Beyond releases, including Fallout, Teenage Mutant Ninja Turtles, and Marvel Super Heroes. Their cards frequently overlap with +1/+1 counters, graveyard mechanics, and abilities representing mutation or superhuman powers.
Fallout's Mutants use rad counters and milling, while Teenage Mutant Ninja Turtles added its mutant heroes and villains. Marvel Super Heroes expanded the type further with characters including Beast, Quicksilver, Ms. Marvel, and Storm.