As infernal beings, ath'schar are subject to demonological ceremonies. They can be summoned as if they were a powerful demon, called into a circle of power with a major sacrifice (ritual murder or torture). Upon summoning, they generally are much less willing to engage in any contracts. They can be coerced or tricked into deals, and as such, they can grant any power that they themselves have, access to Ugolegndar's power, or if they know it, its Name. They will demand a major price (at least a dozen souls).

Capturing an ath'scha without using a major sacrifice requires taking part of their entrails and placing it in a circle of power, then overcoming the ath'scha's will. Once it is captured, the demonologer can wash in its blood and draw sigils of power on their skin in order to be able to channel the ath'schar's power.

Controlling an ath'scha is nearly impossible unless one's will is much greater than theirs. It requires summoning them with a piece of their entrails, then painting one's hands with sigils drawn in their blood.

The ath'schar dwell in the city of Dis in the Infernal Realms. It is ruled by their Queen, S'icanthigul, queen and high priestesss, who has a hundred thousand slaves. She has an elite cabal of knights and her councillors, and beneath her are the noble servitors. She rules with an iron fist, and any who displease her are fed into the great infernal vortex that brings Ugolegndar power, in the hopes it will one day be freed.

Their day to day lives are spent hunting the Hells for wandering souls to sacrifice. Hunter groups are sent out at the behest of the Queen, with one of her knights leading them. A third of the captured souls go to the vortex, a third to the Queen and her inner circle, and the rest are split between the hunters. Almost all ath'schar are hunters.

When a new ath'scha forms, it is an adult, though an ignorant one. It is more or less cloned from the original, though some variations occur, but eventually they differentiate as they consume souls.