Starway Atlas
The Starway Atlas is a modification done to what the Aeldari call the Spirit Monolith within the Xenos ruins on the Desert Crone World of the Smaragdus Mundos System.[1]
When first discovered, the capability of the artefact to exponentially improve a Navigator's capabilities was obvious, however the whole stone was far to strong to use and burned the minds of its hosts. Through the sacrifices of many lives of the Setthala clan, a branch of House Orsellio, Tisiphone II Orsellio was able to break the Xenos artefact into smaller shards and successfully embed the crystals into the House's Navigators, exponentially increasing their power and allowing the Novator control over them. However, when a navigator with this "Atlas" embedded into them dies, they became captive within the Spirit Monolith, an agonising experience which deranged the Monolith's Aeldari guardians and made the artefact volatile.[1]