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Shadow of the storm portal

A portal in Thammaron's throne room, likely part of the dimensions

Infernus, also known as the Infernal Dimensions and Pandemoium, is a world said to be the original home of the demon races, which first arrived in Gielinor during the Second Age to serve the god Zaros. It is described as a world of liquid fire and rocks, somewhat akin to the Mahjarrat homeworld of Freneskae.


Infernus has had a tumultuous history, with power often changing hands. The earliest known race and master of Infernus are the aptly named Infernals, however after a length of time as 'undisputed masters' of this world, they were otherthrown by a subordinate race of demons, known as the Cthonians.

These Cthonians were led by Hostilius the autocrat, who became the leader of Infernus after the Cthonian rebellion took place. It was during Hostilius' reign that Zaros arrived, attempting to barter with Hostilius. He offered the Cthonians the secrets of travelling between worlds to devour whole new races - in return for twelve legions of demons. Hostilius drew up a Magically Binding Contract to seal the deal, but in the fine legalese of the document included a clause that stated the loyalty of these twelve legions would remain with the eldest of the signatories, who Hostilius believed to be himself. Zaros noticed the clause when reviewing the contract - but allowed it to go through. Hostilius barked with triumph - however, Zaros revealed to the assembled demons of his own origins; aeons ago, in a time that predated their race. The humbled Hostilius pledged to Zaros his twelve mightiest dukes and their legions. Little did he know, but in doing so he sowed the seeds of his own downfall.

Living amongst the comparably weak humans of Gielinor was a somewhat luxury, as in their eyes even the lowly Avernic were mighty beings amongst the elite of society. These Avernic started to develop rebellious ideas, unbeknownst the their distant Cthonian masters. The Mahjarrat Zamorak used this to sway many of the Avernic to his side - though only two demons pledged outright allegiance, both members of the Tsutsaroth subspecies. When Zamorak defeated his master Zaros, he returned to Infernus and helped the Avernic triumph over their tyrannical Cthonian masters - a task that took him twenty years. By the time he was done, all Cthonian demons were either destroyed, or exiled to the abyss.

During the quest The Golem, players travel to a realm where the Elder-Demon Thammaron once resided, and where he eventually launched a final assault on the city of Uzer in the Kharidian Desert in what would be later referred to as the Battle of Uzer, an important conflict in the God Wars, during the Kharidian Desert Campaign by Zamorak. The small space, which appears to be Thammaron's throne room, may have been part of an abandoned fortress in one of the Infernal Dimensions.


  • Demon Lords such as Thammaron, Agrith Naar and Delrith
  • Blazehounds are said to come from the Infernal Dimensions, where they guard the Scorched Keep.
  • Three subspecies of demons exist upon Infernus- the cannibalistic Infernals and Chthonians, and the warlike Avernic.
  • Alathazdar is known to have originated from Infernus


  • Infernus is the name given to hell by Dante Alighieri in his famous poem Divine Comedy
  • Cthonia may have been derived from the word 'Cthonic', which describes something pertaining to the underworld
  • The name Avernic may have been dervied from the classical idea of Lake Avernus - a poisionus lake said to be connected to Infernal Realms
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