Jamial the Beastmaker

Player
Whenever a creature you control with 3 or more +1/+1 counters on it deals combat damage to a player or a creature dealt damage by it this turn dies, you may put a +1/+1 counter on target creature.
Mana Pool - {u} or {g} (During your untap step, add {u} or {g} to your mana pool. This mana doesn't empty as steps, phases, and turns end.)