Qilin, the Focoused

Mutate {3}{u}{w}{r/g} (If you cast a 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.)
Vigilance
Whenever you mutate this creature, put a focal counter on it. Cards in your hand cost {1} less to
cast for each focal counter on this creature.