Dark Healer

Energize 2, Flying
Whenever Dark Healer deals combat damage to a player, Diminish 1 (remove 1 counter of any kind
from any number of permanents or players)
If a +1/+1 counter or a poison counter was removed
this turn Dark healer gains a +1/+1 counter
If Dark healer has more than 3 +1/+1 counters it
loses flying and gains Deathtouch