To quote Ir Anûk and Ir Halak, "A method by which Ascendant souls can be detached and integrated into a tautological and autonomous thanatosphere, which we tentatively term an oversoul. Oversouls can be stored in a throne world as a mechanism of enhanced death resilience. As a side effect, new refinements to our Deathsong may be achieved, moving us closer to a generally effective paracausal death impulse." In simpler terms, they are removing their deaths and hiding them in the Oversoul while simultaneously turning them into a weapons