Surgery Altar

{t}: Add {u} or {b}.

At the end of your turn, you may tap Surgery Altar and pay X life to put X counters on it. (X cannot exceed 3, cannot be greater than your unspent
mana, and this card cannot have more than 3 counters.) If Surgery Altar has been tapped six times, sacrifice it.
{t}: Add {x}, where X is the number of counters on it, then remove X counters from Surgery Altar.