When they arrived in the Mortal Realm, Astratis and Nomii had no time to take in the sight. That's because the two were shocked to discover that there was no ethos in the atmosphere!
"How unusual... I can still feel the ethos flowing through my body. But, there is none present in this world. Brother, I have been meaning to ask this, but—how is it that you and your companions can fight so fiercely without the use of ethos?" Astratis inquired.
"In the Mortal Realm, there are different kinds of energy sources one can utilize. These energy sources are similar to ethos in the sense that they allow one to gain power far beyond a normal person's means. However, it's important to keep in mind that at their core, there is always something that separates the energy sources from one another." Izroth explained.