Gleeful Arsonist

Whenever an opponent casts a noncreature spell, Gleeful Arsonist 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.)

対戦相手１人がクリーチャーでない呪文１つを唱えるたび、上機嫌の放火犯はそのプレイヤーに、これのパワーに等しい点数のダメージを与える。
不死