THE GLOOM-SUBSTRAIN

The arrival of the interstellar spore cloud across August 2184, since dubbed "The Gloom", has bought about it several consequences such as the engulfment of multiple sectors, the erosion of all accompanying satellites and, most importantly for all of us roughnecks here, the rampant mutation of the Terminid populations that happen to be inhabiting these areas. 

These so called "Gloom-Strain" Terminids encountered on the first manned Expedition into the Gloom upon Fori Prime on February 18, 2185 that we truly recorded the unchecked muta- no...corruption across the Rebellis-Strain. These horror shows not only gain the benefits of massively increased pain tolerance and increased aggression, but the singular, primal drive to spread and propagate the very same spores that have engulfed the majority of the Eastern Front. It is perhaps fortunate that this Strain seems exclusive to Sectors predominantly affected by the Gloom itself, very rarely venturing beyond their borders. In addition they only appear to be affecting the smaller species of the Rebellis Strain, likely for the specific purpose of hastening the spread of their spores...for now

Keep your guns loaded, armour sealed and filters clear, we need every man and woman alive for this, and may god help us all