Further, what the calendrical dedications had begun, the tradition completed: at the top of the hierarchy was Ahura Mazda, who was supported by the great heptad of Amesha Spentas (Ameshaspands/Mahraspands), through which the Creator realized ("created with his thought") the manifest universe.
In both tradition and scripture, the terms 'Amesha Spenta' and 'yazata' are sometimes used interchangeably.