Ulamog's Crusher 
Creature — Eldrazi
Annihilator 2 (Whenever this creature attacks, defending player sacrifices two permanents of their choice.) This creature attacks each combat if able.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL