Jon Snow Will Kill Daenerys.

Almost since the series began, fans have been predicting that Jon Snow is the Prince Who Was Promised—a reincarnation of the legendary hero Azor Ahai. But most predictions have overlooked a central piece of the Azor Ahai legend, which may spell doom for Daenerys: Azor Ahai, a lousy metallurgist, had a tough time forging his fabled flaming sword Lightbringer. Then he realized he needed to temper the blade by plunging it into the heart of his wife, Nissa Nissa, to imbue it with her power. (Because in the logic of this legend, killing a powerful woman turns a mediocre man into a hero.) If Jon Snow is Azor Ahai, the theory goes, then Daenerys will be his Nissa Nissa—the one true love he must kill in order to save the realm.