Plaguecrafter's Familiar 
Creature — Rat
Deathtouch When Plaguecrafter's Familiar enters the battlefield, choose a creature card in your hand. It perpetually gains deathtouch.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL