|Heroes:|| Nyx Assassin|
The archives contain many tomes of untranslatable spells, as well as bestiaries and biological treatises on dragon cladistics. One ancient book describes the entomological curiosities of the world, including the telepathic zealot scarab, and the unique individual among them known as the Nyx Assassin.
According to the , the Ultimyr Archives are the largest mortal-known archives of the arcane known to exist. This suggests that there are even bigger such archives outside of the possession of mortals.