Ugin, Ethos of the World

+2: Each opponent discards a card or sacrifices a permanent. Until your next turn, prevent all damage that would be done to this planeswalker.
-3: Exile target permanent. You may activate this ability once on any player's turn any time you could cast an instant.
-15: You get an emblem with "You have no maximum hand size. Draw 2 extra cards on your draw step." Spells you cast this cost {0} to cast.