Disgardium. Book 9. In the Glory of Dominion!

The Scythian, known in the Abyss as the tiefling Hakkar, the dean of the worst legion, must gain an audience with Prince Belial to acquire the Embers of Hellfire.
His friends are also keeping busy. The Cliff once again joins the... clan "Awakened" and heads to Terrastera, where one can learn to create a Breach to the Abyss.
Infect is conducting excavations in the Laharian desert. The Bombardier is on the way to the Underwater Kingdom of the Nagas. The Crawler is striving to be the first in the world to build the fifth level of the magical tower.
Tissa and Irida are working on the development of the clan. The novice Giros is battling his own demons. Meanwhile, the legates of the Plague of Morality are gathering a horde of the undead and march on Kharinza...