Almighty Dungeon Master

{t} Target opponent returns all permanents from battlefield, all exiled cards, cards from hand to there library, shuffles it, gains 20 life, draws 7 cards, and can play any number of lands on there next turn.
{ut} Roll percentage die, 80-100% target opponent loses game, 40-79% Target opponent loses 10 life, discards there hand, Sacrifices permanents equal to card's discarded, 5-39% target opponent exiles 1d10 permanents, 1-4% you gain 10 life and draw 7 cards, 0% you lose the game.
{10} Reroll any one