Consisting of a long crystalline station over the Catallus [[Warp Rift]], the Dark Glass was surrounded by a massive planet-sized hollow shell of mirror-like material. The origins of the device are unknown, but it is thought to have been used to test the technology that would later result in the [[Golden Throne]]. Like the Throne, Dark Glass was capable of accessing the [[Webway]] and was commanded by a central Throne that required a [[Psyker]] of enormous power to operate. Accordingly, the Emperor may have planned one of the more psychically gifted [[Primarch]]s to power the device or its sister on [[Terra]]. But as a mere tester of its technology, Dark Glass was far less powerful than the Golden Throne.{{Fn|1}}

Later during the [[Horus Heresy]], the [[White Scars]] were able to eventually discover the now-abandoned Dark Glass' location. They were pursued by a [[Death Guard]] and [[Emperor's Children]] fleet led by [[Mortarion]] himself. In the [[Battle of Catallus|ensuing battle]], an agent of the [[Navis Nobilite]] who had accompanied the Scars, [[Veil]], managed to begin the station's destruction with [[Vortex Weapon|vortex charges]]. As the station collapsed around him and with the enemy closing in, White Scars Stormseer [[Targutai Yesugei]] sacrificed himself on Dark Glass' throne to open a portal to [[Terra]] that allowed the White Scars to escape. Dark Glass exploded shortly after.{{Fn|1}}

*[[Golden Throne]]

*[[Dark Age of Technology]]

==Sources==

*{{Endn|1}}: [[The Path of Heaven (Novel)]] Chapters 22-27

[[Category:Pre-Imperial Times]]

[[Category:Dark Age of Technology]]

[[Category:The Emperor]]