Corpse Explosion 1BR
As an additional cost to cast this spell, exile a creature card from your graveyard.
Corpse Explosion deals damage equal to the exiled card's power to each creature and planeswalker.
Between sacrifice-matters decks, reanimator, and self-mill, there's a lot of board-sweeping fun to be had here.
This is the third damage-based sweeper in this set (so far!) which feels a little excessive to me. Could be nice though, it's inexpensive enough that you should be able to double-spell and cast a creature after it.