Hoover Dam

{1}{t}, one mana of any color to your mana pool, add a brick counter to Hoover dam
{t}, add 3 mana of any color combination, activate this ability only when there are 3 or more brick counters on Hoover dam
If you control Hoover Dam with 5 or more brick counters and your opponents have a combined live total of 5 or less you win the game
"Kimball, Caesar, House... you'd think their whole world was that wall"