Fortress Orpheon

[Heavy Encryption]

-Fortress built by an Astartes Chapter—specifically, the Angels Encarmine—for Melidoche Traquiel, the first Planetary Governor of House Traquiel. Incredibly robust in defenses; front door appears to be operated by a gene-encoded locking mechanism that responds to the blood of some members of the Traquiel lineage (possibly only the biologically female descendants).

-Contains the true mausoleum of House Traquiel; many of the tombs and their mechanical preservation functions remain in operation, though some have failed due to lack of tending for more than a century.

-Location was lost 120±6 years ago; however, Anvephone Traquiel discovered its location at some point, and conveyed it's general coordinance to Vector van Flange such that the Magos could create a means to reach it. It appears that she used the Fortress as a secret and secure base of operations.

-It is likely that the Fortress was abandoned due to the presence of a (likely Cinquefoil) device, hereafter called the Null Singularity, that exists deep below the main structure. The potency of null psychic field it generates is sufficiently overpower to prevent any approach from psychically awakened individuals, and be potentially lethal even to non-psykers who remain in close proximity for too long.