Mutate (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.)Lifelink (Damage dealt by the creature also causes its controller to gain that much life.)
Whenever this creature mutates, create two 1/1 white Cat creature tokens with lifelink (Damage dealt by the creature also causes its controller to gain that much life.).