Life Fall Waters

({t}: Add {u} to your mana pool.)
If you have 10 or more islands and one other type of land at any point, you win the game.
Life Burst - {ut}, sacrafice another island: You gain 4 life. If that land was untapped, You gain 5 life instead. Activate this ability only if you have more life than your starting life total or you have 5 or more life than each other player.