When Nicol Bolas, the Ravager enters the battlefield, each opponent discards a card.
: Exile Nicol Bolas, the Ravager, then return him to the battlefield transformed under his owner's control. Activate this ability only any time you could cast a sorcery.
+2: Draw two cards.
-3: Nicol Bolas, the Arisen deals 10 damage to target creature or planeswalker.
-4: Put target creature or planeswalker card from your graveyard onto the battlefield under your control.
-12: Exile all but the bottom card of target player's library.