Surprise, Nerd! 
Enchantment
Flash If a creature would get + some amount of power or toughness until end of turn, instead it gets - that amount of power or toughness.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL