Volcanic Torrent 184/342 (Commander: Outlaws of Thunder Junction)

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.) Volcanic Torrent deals X damage to each creature and planeswalker your opponents control, where X is the number of spells you've cast this turn.

NM - $0.50
LP - $0.50
MP - $0.50
HP - $0.50
DMG - $0.50