Reuben of the Downward Stair

Flying.
Reuben does not untap during your untap step.
{u},{t}: Remove up to 3 Dogs from combat.
{b},{t}: All other creatures get -3/-0.
{g},{t}: Play a 0/3 colorless Dog creature token.
{3}: Untap Reuben. Draw a card.
Reuben! Yes!