Veradrome, Black Death

+2: target creature gets -1/0 counters until its power is the lowest among creatures that player controls. Remove counters at the start of my untap
0: (passive) Whenever this plainswalker dies or is destroyed, destroy target creature and create three 5/6 black leviathans.
-20: You get an emblem with. "At the beginning of your upkeep choose one; Destroy target creature, draw 5 cards, or create 5 4/5 tentacles with reach