The Viskeon are blue-skinned humanoid creatures that are cold-blooded, able to spit acid, and have an uncanny ability to regenerate their lost limbs and organs. The Viskeon homeworld was a hot and parched planet, dotted with jungles and plans, perfect for a cold-blooded species. Viskeons prize martial prowess, and view melee combat as one of the highest honors possible; they prize melee combat so much that ranged combat is viewed as dishonorable and cowardly in their society. When a tyranid incursion invaded their home world, nearly all of the viskeons died, except for those off-world as mercenaries or bounty hunters. To this day, viskeon mercenaries are a rare but prized sight to behold.