Haberthrasher 
Creature — Human Hatificer Assassin
Deathtouch Whenever another creature you control that has a hat enters or a hat sticker is put on a creature you control, each opponent loses 1 life.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL