Stark Tower, The Avengers H.Q.

{t} Pay 1 life : Add {u} or {r}.
{t}: Add one mana of any color. Activate this
ability only if you control a creature with a +1/+1 counter on it.
{u/r}{u/r}{u/r}{t} Sacrifice Stark Tower: Put a +1/+1
counter on target creature and draw a card.