Rot-Tide Gargantua 
Creature — Zombie Kraken
Exploit (When this creature enters, you may sacrifice a creature.) When this creature exploits a creature, each opponent sacrifices a creature of their choice.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL