Riuji, Backstabber

+1: Target Creature gains a -1/-1 Counter and one target creature gets a +1/+1 counter
-2: Curse Target player with leaching (whenever that player would gain life the player that cursed them does instead)
-8: Each player separates all permanents they control into two piles and chooses which one is which face, then flip a coin and exile the pile fipped