|Built||14 Brighstar 8992 GE|
In the Demon Spawn War, the future god Surtur helped the Covenant when he had to. When Demogorgon started his push north towards Inirthak, Covenant leadership reluctantly gave Surtur the go ahead for his fiery terraforming of the Agulbandal depression. Typhalumus, in the northwestern wing of the Trundar mountains, was one of two volcanoes planned to make the landscape around, volatile and difficult to cross for even demon armies.
In the God Era, the creation of volcanoes by the likes of Surtur was becoming much harder. Surtur's rival Kossuth said this was product of the Creation War, with the systems outside of Chaos becoming girded with Negative Entropy. The threat of Demogorgon was imminent, the Covenant wanted Surtur's work done quickly. As mentioned making volcanoes was now hard for even Surtur, so to meet his superior's demands he needed a boost. Unknown to his goodly Covenant superiors, this boost came in the form of sacrificing a primordial prisoner. Lukoon, a Covenant leader willing to make the hard decisions, got Surtur in Thunder Halls. Inside this floating prison, the two freed one of its prisoners, a watery elemental by the name of Typhalumus. A foe of the previous war's version of the Covenant, this mighty primordial now only wanted death. In various Covenant prisons, the last Thunder Halls, she was tired of nearly four centuries of imprisonment. Surtur told Typhalumus that her name would be remembered long after she expired. Lukoon lied, telling her that she would return to the Sea of Entropy, be reborn in whatever Chaos's choosing. Seeking death, Typhalumus followed their commands. She gave up her energies to Surtur. Surtur kept his word, naming his newest volcano Typhalumus. Its opposite, Vaermund, on the other side of the Agulbandal depression was given the typical Giant name.
In the Horgon Era, Typhalumus cooled. This came as a result of natural cave-in. This severed the volcano's link to the lava river Annbild Hrolmir turning it into a dead volcano.
Inside Typhalumus's caldera, along its lower western rim is the city of Gúluzgash. Past the city's walls and outer structures are hundreds of miles of tunnels. These honeycomb the mountain, descending into the Underdark sector of Garathral. This lower area is territory of the Surticon empire. It is a hellish area near the Annbild Hrolmir lava river. It is very hot with noxious gases, a haven for fire giants, salamanders, fire trolls, and other fiery brutes.