Kibo, The Uktabi Prince

{t}: Each player creates a colorless artifact token
named Banana with "{t}, Sacrifice this artifact: Add {r} or {g}. You gain 2 life."
Whenever an artifact an opponent controls is put
into a graveyard from the battlefield, put a +1/+1
counter on each creature you control that's an Ape or
Monkey.
Whenever Kibo attacks, defending player sacrifices
an artifact.