Erratic Mutation

Instant, 2U (3)
Choose target creature. Reveal cards from the top of your library until you reveal a nonland card. That creature gets +X/-X until end of turn, where X is that card's converted mana cost. Put all cards revealed this way on the bottom of your library in any order.
Illus. Zoltan Boros & Gabor Szikszai

Gatherer Card Rulings [Nov 2009]

• 2/1/2007: The target is chosen before the cards are revealed.
• 2/1/2007: If a split card is revealed, the creature gets two +X/-X effects, one for each half of the split card.

Format Legality	Legal in Vintage, Legacy, Extended Banned in Standard
Printings (1/9)	Planar Chaos (Common)