Nightmare of Apocalypse

Annihilator 5
Apocalypse-{5}{p/c}{p/c}{p/c}{p/c}{p/c} Destroy all non land
cards target opponent controls, that player then
takes damage equal to the combined mana cost
of each card destroyed this way
"We'd stared into the face of Death, and Death
blinked first. You'd think that would make us feel
brave and invincible. It didn't"
-Rick Yancey