Cells of the Soul

The Dead Soul Sea was a desert of red sand. Beneath this red sand was a Dead Soul, siphoning the soul energies of living creatures to fuel their perpetual state of Immortality. If the existence had to resort to such passive means to absorb and refine soul energies, then it meant it was too far gone and relying solely on instincts while in hibernation.

While that was a fancy way to put it, in truth, it was essentially brain dead. A Dead Soul, despite being an Infernal Deity, had lost their Soul Flame, replacing it with another medium, typically a Hell Altar of the Infernal Path, allowing one to become an Infernal Forger.