Rena, A Story's End

: Whenever a player activates a loyalty ability of a planeswalker each opponent sacrifices a permanent and loses 1 life.
0: Create a 1/1 black Ooze creature token with deathtouch and indestructible.
-2: Put a -1/-1 counter on each creature you don't control, then put a +1/+1 counter on each creature you control.