Forced To Feed

As an additional cost to cast this spell, pay 2 life
or sacrifice a creature.
Each opponent sacrifices a creature or
planeswalker. If they cant, they lose 2 life.
"In order to be released from that agony, it doesn't
matter what it takes even if it means using your
friend's life, right?... That's the hunger of a ghoul.
That's our destiny. I'm really tired of it...
This time I'll help you out!" -Touka Kirishima