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

Crystal Keep Rulings Summaries

• You choose the target before revealing cards. [Planar Chaos FAQ 2006/12/13]
• If a split card (Rule G19.25) is drawn, it has two converted mana costs and so two +X/-X effects will occur. [Planar Chaos FAQ 2006/12/13]
• Note - Also see Converted Mana Cost, Rule G3.29.

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