Nemexus was built by the disembodied thinker Ingu'lumin. In the Creation War (1486 DE - 8777 DE), this marvel of engineering served as his abode and research center. When he died on 402 LE, it triggered the release of those that would come to patrol the ancient edifice and the land around. Thousands of years later, air elementals still carry out their security directives. They guard it from any that seek to get inside. When one of Nemexus's Eternal Wardens perishes, another is released from the structure's thousands of secret vaults, taking its place or carrying out the last order it was given.
Nemexus contains a library of ancient lore. These are not your normal books or rune-carved stones. Ingu'lumin's "writings", what would become called psychic imprints, are laid out with psychic energy.
Ingu'lumin's psychic imprints is scattered across a mammoth edifice covering six square miles. Some imprints are only reachable by flight, their locations among rotating earth mote rings. Nemexus, a thing of entropy, did not leave an orderly path, with imprints scattered about as if in the Sea of Entropy. Perhaps the worst of all is that they are always shifting places. Learning anything at Nemexus is truly a time-consuming endeavor. It is also a dangerous one. The hazards of the area are not limited to the air elementals. There are magical constructs left from the time the place was controlled by the Lith-Crillion. The Lith-Crillion came into ownership of this place in the Maziggandîm Conflict (348 LE - 355 LE). Like the previous owners, the Tarband-Khâl, the victors of this conflict wanted Ingu'lumin's library.
After their capture of Nemexus, the Lith-Crillion of Sâlo Tânê 12 found carefully hidden chambers. These required someone to have a deep understanding of arcane energy just to see them. These secret rooms were like unmovable portable holes, recesses in the Web of Magic. These and other findings at Nemexus led to the revival of the lost art of Webweaving.