Changes

Cain's actions on Perlia would come back to haunt him on two occasions during the eighty years between the first and [[Second Siege of Perlia|second]] sieges of that planet. The first occurred during the campaign on Periremunda, when Cain discovered that the Ordo Xenos and the Adeptus Mechanicus had been working on a secret project surrounding an artifact known as the "[[Shadowlight]]". This unusual artifact, which predated the existence of Mankind itself, activated the powers of latent psykers and boosted the powers of active ones. The Shadowlight had been contained in a secret Mechanicus shrine located within the dam in the Valley of Daemons on Perlia's eastern continent until it had been taken by a rogue tech-priest named Metheius, in the employ of Inquisitor Killian of the Ordo Hereticus. When Cain arrived in the dam - shortly before destroying it, flooding the valley and drowning scores of Orks - he had found that the tech-priests of the shrine had been killed with surgical precision, and found out later that this had been the work of Killian and Metheius.