Domains: Hammered iron, anvil-craft, the dwarven hammer-stroke.
Era of ascension: Great Expansion. Cohort: current. Krondeum coalesced slowly across the long centuries of the Expansion, as the scattered remnants of the First Brotherhood reassembled themselves clan-hall by clan-hall and resumed the old anvil-rites in shapes the dead had not lived to teach.
Worshipped by: The First Brotherhood as institution; the Fengruk, Uline, Carillon, Verucan, Hestrube, Dern, Drasnian, Glorindian, Grendel, Gruynmar, and Sennites clans, and the diaspora dwarves and unhalled master smiths who still bring a finished thing to a clan-hall fire before they will call it done. (The worships edge is authored downstream on the worshipper, not here.)
Krondeum's rite is the presentation of the shaped article: a weapon, a vessel, a chain-link, anything the smith counts as finished. The smith carries it to the clan-hall fire, names the hand that will carry it next, and lays it on the anvil, not into the flame. The flame is only the witness. The naming is the prayer. A blade with no named carrier is not blessed; a finished plough whose farmer is dead in the war is brought to the hall anyway, and a substitute is named aloud so the work is not orphaned.
He is not Kaerath. Kaerath's forges were volcanic and his worshippers were the great smiths of the Golden Age, who poured raw fire through stone; that fire ate its own priesthood when the Kajiit eruption took the sacred sites. Krondeum is the answer the surviving dwarves built after the Long Winter: small fires, tradition-bound, hand-shaped, never raw. The Verucan who live inside the heat of Mount Kajiit pray to a different patron entirely (Karnaeum), and the Uline who mine the ore that becomes his iron pray first to Krunites at the vein-strike, then to Krondeum when the bar is hammered. The two moments are sequential and the worship-gestures do not cross: Krunites owns the first ore from a new vein; Krondeum owns the named finished thing. A clan-hall smith who skips either rite is corrected, sometimes by elders, sometimes by the work itself going wrong.
The First Brotherhood enforces no orthodoxy. Each clan keeps its own anvil-prayers and its own version of the naming, and Krondeum accepts the variations as he accepts the work, by whether the carrier has a name.