Changes

==Overview==

The Xenos became a threat to the [[Imperium]], when it used its immense psychic abilities and the power of the Warp, to corrupt the population of three [[Imperial]] [[System]]s into the worship of the [[Chaos Gods]]. However its reign of terror, finally ended when the [[Blood Angels]]' [[Chief Librarian]] [[Marest]], led his [[Chapter]]'s forces to battle against the Octocalvariae and its damned followers. At the war's end, the Octocalvariae's followers were dead at the Blood Angels' hands, but the Chapter discovered the Xenos itself was unkillable. The Octocalvariae's corrupt nature healed any wound dealt to it and only at great cost, were the Blood Angels able to capture and bind the Xenos. Marest himself was mortally wounded in battle with the Xenos, but before he was put within a life saving Sarcophagus, he ordered that a prison be constructed that could hold the Octocalvariae. Named the '''Vault of Marest''', it was constructed beneath the Blood Angels' [[Fortress Monastery]] and has held the Octocalvariae, which has had no access to food or water, for three thousand years. After its imprisonment, the Blood Angels have tried various ways to kill the Octocalvariae, but each has ended in failure; as have attempts to discover what Xenos species, the heavily mutated creature was spawned from. All the while, the Octocalvariae laments the deaths of its followers and vows it will one day be free.{{Fn|1}}