Raticate

Mutate {2}{g/w}(If you cast this spell for its mutate
cost, put it over or under target non-Human creature
you own. They mutate into the creature on top plus all abilities from under it.)
———{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}
Whenever Raticate deals combat damage to a
player, destroy target artifact or enchantment
that player controls.
Whenever this creature mutates, if it mutated
onto Rattata, target creature can't block