Nicol Bolas, Unsurpassed

+2: Return a Creature or Planeswalker from your graveyard to the battlefield. You lose life equal to that card's converted mana cost.
-5: Untap all lands you control, then draw X cards where X is Nicol Bolas, Unsurpassed's Loyalty.
+10: You get an emblem with "at the beginning of your upkeep, sacrifice this emblem, return all permanents from your graveyard to the battlefield"