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The '''Pharos''' is a pre-[[Imperial]] piece of [[XenosNecron]] [[Tyranid|{{5}} bio-technology]] that is able to harness empathy to aid in [[Warp]] travel.{{fn|3}} Used to navigate the Warp much like the [[Astronomican]], except while the former acted as a "lighthouse" in the Warp the latter was a "lantern". The Pharos allowed the user to find or even teleport to a location they either consciously or subconsciously desired.{{fn|1}}

The Pharos array was originally constructed by the [[Necrons]] for rapid communications and [[FTL]] travel. However when the Necrons emerged into their great slumber, the array went inactive. By the [[Age of the Imperium]] the only known surviving Pharos was discovered on [[Sotha]] . [[Belisarius Cawl]] states that he found another Pharos elsewhere, but it was long destroyed.{{Fn|5}} The Pharos was discovered by [[Humanity]] on Sotha by [[Barabas Dantioch]] during the [[Horus Heresy]] and used by [[Roboute Guilliman]] as a beacon to attract scattered loyalist forces to his new empire, [[Imperium Secundus]].{{Fn|1}} The Pharos became the subject of battle when the [[Night Lords]] under [[Krukesh]] discovered the nature of the device and became determined to claim it in order to find the [[Nightfall]] and [[Konrad Curze]]. In the ensuing [[Battle of Sotha]], Dantioch overloaded the Device to defeat the traitors and its engines fell silent for the first time. Unknown to all involved, this act served to alert the [[Tyranids]] to our [[Galaxy]].{{Fn|2}}