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Located in the Eastern Fringe, Etiamnun was reputedly gifted to the Imperium by the Eldar of Altansar Craftworld. The Reclusiam built there was only ever sparsely staffed by Imperial scholars, but was significant in that not only did it contain an inert Webway Gate, it was also under the covert protection of the Order Psykana of the Blood Ravens Adeptus Astartes. Aside from this compact, the Reclusiam had no particular defensive capabilities, instead relying on secrecy and obscurity. This strategy proved flawed when the existence of Etiamnun III was discovered by Ahzek Ahriman of the Thousand Sons. As part of his grand design to enter the Black Library of Chaos, Ahriman dispatched a warband under the command of the Sorceror Mordant Hex to conquer the Etiamnun Reclusiam.
Hex was able to gain dominion over the Reclusiam easily, as well as secure the Webway Gate, allowing the Thousand Sons to penetrate that Eldar domain. By the time a relief force despatched by the Order Psykana arrived at the Reclusiam, the traitor marines were long gone; the only trace of their presence a discarded copy of the Tome of Karebennian, an Eldar text that is reputed to be a guidebook of sorts to various Webway routes that lead to the Black Library.
- 1: Dawn of War: Tempest - Blood Ravens: The Dawn of War Omnibus by C.S. Goto, Chapter Ten: Contestation, pgs. 719-721
- 2: Atlas Infernal (Novel) by Rob Sanders, Interregna #3