Jace, the Mind-Blade

: Jace, the Mindblade transforms from and into Jace, Author of the Guildpact.
+1: Draw a card. If it's an instant or sorcery card, you may cast it with its mana cost reduced by 1 until end of turn.
-12: Draw ten cards. Before discarding, you may cast any number of sorcery cards from those cards without paying their mana cost. Transform this card.