The Walk of Death

Halt - {p/w}{p/w}{p/w} (Rather than play this card from your hand as a sorcery, you may play it as an instant with the mana cost of {p/w}{p/w}{p/w}on an opponent's turn.)
Destroy all permanents that were played this turn and up to one permanent that wasn't.
Here comes Death/To snuff out your breath/He sowed your seed/And now he'll make you bleed
-From The Creepy Story