Krark-Clan Siege Tower

Collapse 2 (This land comes into play with
two collapse counters on it. Whenever
you tap this land, remove a collapse counter
from it. When the last is removed, sacrifice
it.)
{t}, add {b}{r}{g} to your mana pool.
{b}{r}{g}, {t}, deal 10 damage to an opponent
at random.
If this is the second time Krark-Clan Siege
Tower is played, you win the game.