Plargg and Nassari (Showcase) (68) [March of the Machine: The Aftermath] [Showcase, Borderless]

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.