Billy Hargrove, Flayed

Mutate {4}{g/w}{b}{b} (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.)
Deathtouch, lifelink
Whenever this creature mutates, return any
number of target creature cards with total power
10 or less from your graveyard to the battlefield
"Don't be afraid. It'll all be over soon."
(Nethroi, Apex of Death)