Temüjin was proclaimed Genghis Khan, the 'Universal Ruler,' in part due to a prophecy that a great leader would unite the Mongols and conquer the world. Genghis Khan's shaman, Kokochu, legitimized his rule through divine revelations, declaring that the Eternal Heaven had granted him the empire. This prophecy fueled the Mongol conquests, which reshaped Eurasia and established the largest contiguous land empire in history.

The legend of Genghis Khan and the prophecy of his rise has been a powerful theme in Mongolian and world literature, from the Secret History of the Mongols to modern novels and poetry. It represents the intersection of shamanistic prophecy, political ambition, and epic conquest, inspiring works that explore themes of unity, destiny, and imperial power.