Shadowkeepers

Under the Empresses golden castle lies the Dark Cell's. In these cells are dark age of technology weapons too dangerous to use regularly, unkillable monsters that threaten man kind and other horrible things being kept secret from humanity. The Shadow Keepers job is to make sure none of these things leave unless the Empress has need of them, then putting them back once she's done.

However they where given another job when Magnus weakened the barrier between the physical plane and the warp. Some demons took alot of the stuff in the Dark Cells into the warp, then spread them across the Milky Way. Half stayed behind to protect what's left while the other half left to track these things down and bring them back. There are countless horrors in the far reaches of space. However with the Shadow Keepers around, you can rest easy knowing there's a few less out there.