Envoy of Peace

Flying, vigilance
Whenever Envoy of Peace would deal combat
damage, prevent that damage. If you do, each
player gains life equal to the damage prevented
this way, then put a +1/+1 counter on Envoy of
Peace.
{1}{b}, Remove a +1/+1 counter from Envoy of
Peace: Put a -1/-1 counter on another
target creature.