Erratic Explosion

Choose any target. Reveal cards from the top of your library until you reveal a nonland card. Erratic Explosion deals damage equal to that card's mana value to that permanent or player. Put the revealed cards on the bottom of your library in any order.

The List

Planechase Anthology

Choose target creature or player. Reveal cards from the top of your library until you reveal a nonland card. Erratic Explosion deals damage equal to that card's converted mana cost to that creature or player. Put the revealed cards on the bottom of your library in any order.

Planechase 2012

Onslaught

If all your cards are lands, no damage is dealt.