Mimesis

Deathtouch, Reach, Changeling Mimesis may enter as a copy of any creature on the battlefield, except its name is Mimesis, it’s a bird in addition to its other types, and it enters with X +1/+1 counters on it. X,X, Sacrifice another creature you control: Create a copy of Mimesis, except it has “When this creature is dealt damage, sacrifice it“.