Not sure if intended or a bug. Punish Arrogance is supposed to make enemies "take damage equal to 400% of their attack. Healer, who doesn’t attack actually gets damaged by this quite a bit. Maybe the healer has an attack value even if he never attacks? Or maybe the heal value is stored in the same object location where attack would normally be.
Maybe it is intended, but Summon Healer is fairly underwhelming to begin with, especially for an epic card ( which is why I got 4 of the damned things and no other epic spells ).