This astonishing loop hinges on cloning a transformed Saga with a clever identity crisis, allowing you to bypass its restrictive once-per-game limitation entirely. By having Auton Soldier enter the battlefield as a nonlegendary copy of Avatar Kuruk (the back face of The Legend of Kuruk), you gain access to its formidable Waterbend exhaust ability without being locked out by the rule that normally restricts each exhaust to a single use. Y'shtola Rhul facilitates this exploit by blinking the Auton Soldier at the beginning of each end step, resetting its copied state so you can continuously rebuild the Avatar Kuruk engine across infinite additional turns.