Ugin-Bolas, Redeemed

+3: You get an emblem with "Sacrifice this emblem: Counter target spell." Draw a card and each opponent discards a card.
-X: Exile all non-land permanents with converted mana cost X or less. Create a 2/2 colorless spirit for each card exiled this way.
-15: For the rest of the game, you may cast spells without paying their mana costs. Draw seven cards.