Tundaris, Darkening Doom

0: Sacrifice a creature or discard 2 cards to destroy target creature. Put a loyalty counter on Tundaris for each creature in target graveyard.
-X: Destroy each creature with mana value equal to half X or less (rounded down). Then, target player mills X.
-15: Each opponent mills 9, then put each permanent from each graveyard onto the battlefield under you control.