The One Ring

{w}{u}{b}{r}{g}, {t}, Gain control of all creatures on the battlefield, until end of turn.
{6}{b}, {t}, Put all creatures from each graveyard onto
the battlefield under your control. At the end of your
upkeep exile those creatures.
{10}{r}, {t}, Sacrifice The One Ring, you draw seven cards, you gain 7 life, and you may untap seven permanents, and each of your opponents discard seven cards, lose 7 life, and tap seven of their permanents.
Your next upkeep you win the game.