Each instant and sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost.
Flashback 4R (You may cast this card from your graveyard for its flashback cost. Then exile it.)
MYTHICSPOILER.COM THE CYCLICAL MTG SPOILER
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AMONKHET
AETHER REVOLT
KALADESH 
COMMANDER 2016
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