Professor Percy

{t}: Each player creates a colorless artifact token named Banana with ' {t}, Sacrifice this token: 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 a Monkey.

Whenever Professor Percy attacks, defending player sacrifices an artifact of their choice.