Nicol Bolas, the Ravager

Flying Nicol Bolas, the Ravager enters the battlefield, each opponent discards a card. 4UBR: 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. // Nicol Bolas, the Arisen [+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 a graveyard onto the battlefield under your control. [-12]: Exile all but the bottom card of target player's library.