BloodBats

 In the obsidian depths beneath the fractured crust of Teton’s abandoned mining network lies a cathedral-sized cavern known as Buried Hollow. Once thought to be merely an extension of the Wall Crawler tunnels, it was later discovered to house an older terror: the Blood Bats.  These creatures evolved in complete darkness, their wings veined with bioluminescent tracer veins that only reveal themselves when feeding or enraged. Long before the Wall Crawlers infested the surface ruins, a genetic corruption leaked into the underground aquifers during the first Proto-Tech War. Experiments in regenerative healing and neural reanimation were dumped in the fissures—forgotten, but not inert. From the corrupted marrow of the blind cave bats, something new clawed its way into existence.

 Though most feared for their feeding frenzies, the Blood Bats are also seen as omens. Survivors of their attacks often claim the bats “whisper warnings” just before they strike—echoes of the experimental neuromatter that shaped them. Some Aggregate theorists believe the Blood Bats remember the minds they fed upon.