Huey, Dewey, and Louie

{g}, {t}, Sacrifice an artifact: Put two +1/+1 counters on target creature you control.

{1}{u}, {t}, Remove a counter from a creature you control: Draw two cards.

{2}{r}, {t}, Discard a non-artifact card: Return an artifact card from your graveyard to the battlefield, then create a tapped Treasure token.