Plargg and Nassari (March of the Machine: The Aftermath)

Legendary Creature Ñ Orc Efreet - At the beginning of your upkeep, each player exiles cards from the top of their library until they exile a nonland card. An opponent chooses a nonland card exiled this way. You may cast up to two spells from among the other cards exiled this way without paying their mana costs.