Sudden Edict 
Instant
Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.) Target player sacrifices a creature of their choice.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL