Chealse Slyy, Wary Guardian

{2}{b/g}: For each counter on target permanent, remove another of those counters on that permanent.
{w/b}{w/b}{w/b}: Exile an artifact, creature, and enchantment an opponent controls and they lose 3 life.
3{g/w}{g/w}{g/w}: All creatures an opponent controls become 1/1 until your next turn.