Malasion, the Mirror-Mold

Mutate {1}{u/b}{r/g}
Whenever this creature mutates, copy target
triggered ability of a creature on the battlefield.
Whenever you cast an Ooze creature spell, you
may create a token copy of any non-Human
creature on the battlefield. If you do, put the
Ooze spell on top or under that token. Then
mutate into the creature on top plus all abilities
from under it.