Magical Hacker 
Creature — Human Gamer
: Change the text of target spell or permanent by replacing all instances of + with -, and vice versa, until end of turn.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL