Adchachel, Black Lotus of Mystery was the leader and demiurge of the Occultists during the War of the Deeps. As one of the key unit commanders serving under Nicator, he led the Occultists of the Seleucarian Empire to battle against the Tsol'teth hordes of the Underrealm. Adchachel would also be known by a later epithet, the Rose of Pain.
When Agith'maal's regenerative abilities necessitated that the Tsol'teth lord's heart be cut out, Adchachel devoured the organ for the Necromantic essence that it contained. As this heart was the true seat of Agith'maal's life force, the dark energies of the Tsol'teth began to slowly twist and corrupt Adchachel over a period of four years in which his insanity grew more and more apparent. It was during this period that Adchachel sired a son, the unwitting heir to the malignant energies of the Tsol'teth. Adchachel was eventually burned alive in his private laboratory after his insanity culminated in a series of murderous rampages. His closest friends defended him to the death, and to this day it remains to be seen whether their motives were out of guild fealty or the influence of dark magics such as the Tsol'teth Litany of Obedience.
In time, Adchachel's descendants rose to the ranks of nobility; by the age of the Wars of Succession, his scion Castomira Brangwin served as the duchess of Aster Malik.