In the Zoroastrian tradition, druj comes from Angra Mainyu (also referred to in later texts as "Ahriman"), the destructive spirit/mentality, while the main representative of Asha in this conflict is Spenta Mainyu, the creative spirit/mentality. Ahura Mazda is immanent in humankind and interacts with creation through emanations known as the Amesha Spenta, the bounteous/holy immortals, which are representative and guardians of different aspects of creation and the ideal personality. Ahura Mazda, through these Amesha Spenta, is assisted by a league of countless divinities called Yazatas, meaning "worthy of worship", and each is generally a hypostasis of a moral or physical aspect of creation. According to Zoroastrian cosmology, in articulating the Ahuna Vairya formula, Ahura Mazda made the ultimate triumph of good against Angra Mainyu evident. Ahura Mazda will ultimately prevail over the evil Angra Mainyu, at which point reality will undergo a cosmic renovation called Frashokereti and limited time will end. In the final renovation, all of creation—even the souls of the dead that were initially banished to or chose to descend into "darkness"—will be reunited with Ahura Mazda in the Kshatra Vairya (meaning "best dominion"), being resurrected to immortality. In Middle Persian literature, the prominent belief was that at the end of time a savior-figure known as the Saoshyant would bring about the Frashokereti, while in the Gathic texts the term Saoshyant (meaning "one who brings benefit") referred to all believers of Mazdayasna but changed into a messianic concept in later writings.