Hag of Scoured Thoughts 
Creature — Hag Warlock
At the beginning of your upkeep, each opponent mills five cards. Then exile each opponent's graveyard.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL