Domains: Magma-interior, sacred fury, passion-as-discipline.
Era of ascension: Great Expansion. Cohort: current. Karnaeum rose as the Verucan dwarves consolidated their habitation inside the active vents and chamber-systems of Mount Kajiit, and the daily intimacy with magma produced a theology distinct from any forge-cult that had come before.
Worshipped by: The Verucan, in the chamber-halls cut directly into the volcano's lower vents. Outsiders find the heat fatal in minutes; the Verucan find it the resting temperature of their own bodies. (The worships edge is authored downstream on the worshipper, not here.)
Karnaeum is the fire you live inside. The cultural inflection is bodily: the Verucan's obsidian-skin and the red veins that show through it are not metaphor but biology — the patron's temperature is their temperature, and a Verucan who has gone cold has gone irreligious in a way no amount of corrected practice will fix. Anger, on the Verucan account, is not a lapse from discipline but the discipline itself; the patron's fury is the engine of a measured craft, and an outsider's mistake is to read the visible heat as loss of control. The Verucan know which sentence to finish before they break the table. Karnaeum keeps the count.
He is not Kaerath. Kaerath was the universal volcanic forge of the Golden Age, who took fire as raw substance and gave it to the great smiths to work; he died when the Kajiit eruption took his sacred sites. Karnaeum did not inherit that worship and does not pretend to. He is not Krondeum either — Krondeum is the hammered-iron pan-dwarf patron whose rite is the finished article brought to a clan-hall fire, a craft that holds the metal at arm's length. The Verucan hold the metal at no length at all. They walk through chambers where the working ore is a wall, and the patron is the heat in their bones that lets them do it. Krunites, the Uline industrial patron, owns the iron extracted from cold seams against the dark; the Verucan find that theology incomplete, because their iron is not extracted at all — it is decanted, and the patron is the one who keeps the pour true.
The Verucan have no written prohibition against rage. They have a written prohibition against rage that fails to finish the work.