Myrkul's Edict 

Sorcery
Roll a d20. 1—9 | Choose an opponent. That player sacrifices a creature of their choice. 10—19 | Each opponent sacrifices a creature of their choice. 20 | Each opponent sacrifices a creature with the greatest power among creatures that player controls.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL