Talia, Nullmage Prodigy

+3: Exile up to two permanents you control. Return those cards to the battlefield under your control untapped.
-X: Exile target spell with converted mana cost X and exile all spells with the same name in the owner's library. This ability has flash.
-12: You get an emblem with 'You may cast cards your opponents own from exile without paying their mana costs'.