Everquill Phoenix
{2}{R}{R}
Creature -- Phoenix
4/4
Mutate {3}{R} (If you cast ~this~ 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.)
Flying
Whenever ~this~ mutates, create a red artifact token named Feather with "{1}, Sacrifice ~this~: Return target Phoenix card from your graveyard to the battlefield tapped."