Umstry, the Dying Castle

Decaying Bricks —This land cannot enter the battlefield from your library. You cannot proliferate counters on Umstry.

Sacrifices Must Be Made —Whenever you sacrifice a creature, you may either draw a card or put a brick counter on Umstry.

Exert Our Little Power —{t}Add X mana in any combination of {b} and {w} where X is the number of brick counters on Umstry.