{1}{U}legendary creature — octopus

whenever you cast a noncreature spell, if at least four mana was spent to cast it, tap target creature an opponent controls and put a stun counter on it. (if a permanent with a stun counter would become untapped, remove one from it instead.)

whenever you cast a noncreature spell, if at least eight mana was spent to cast it, put eight +1/+1 counters on ultros.