Ethermass is one of the basic building blocks of life on Dreyrull; an energy that can transform into anything from light to solid matter through various processes. Aershaa are born through a process that solidifies Ethermass into a living being. The working behind this remain a mystery, bout Souldancing is outlined here.
Ethermass is composed of a male and female counterpart, Era, the female Ethra, and Ora, the male Ethra, which exist simultaneously within Dreyrull itself, but individually within their respective genders. Male Mages call upon the Era of the world to utilize its properties, while Female mages call upon the Ora.