This self-sustaining loop turns a seemingly modest discard spell into an engine for the entire library. By aiming Chain of Smog at yourself, you satisfy its requirement while retaining the option to copy it back onto your own head endlessly, generating a torrent of repetitions. Meanwhile, Archmage Emeritus watches every single copy hit the stack through its magecraft ability, turning each iteration into a drawn card until you find whatever game-winning payoff you need.