Gleeful Arsonist
From Duskmourn: House of Horror Commander set
Gleeful Arsonist
Creature — Human Wizard
1/2
Whenever an opponent casts a noncreature spell, this creature deals damage equal to its power to that player.
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)