Spiderdemon

Spiderdemons are highly intelligent non-humanoid demonic commanders.

Biology
Spiderdemons are large, usually sessile beings, resembling brains. They bear grey semi-humanoid faces with red eyes and sharp teeth. They appear to have either no nose or a very small and indistinct nose, and their features appear notably sunken, angular, wrinkled, and almost skeletal, but any internal skeletal structure is unknown, as they appear to be almost entirely brain, similarly to Kalibas' species. Their essence is able to fuse with Humans, which can allow them to grow four partially organic crab-like legs, makes them far larger, and makes their features oddly appear more alien, with two split jaw components bearing extra teeth. The only visible organic limbs on an unmerged Spiderdemon are two spindly, near-useless arms. Notably, their souls can survive long after death, which is what allows them to merge with Humans and regain an organic body. Their usual cybernetic chassis consists of a blocky "seat" with four mechanical legs, and an oversized chaingun on its underside. Spiderdemons are known to be very durable and highly intelligent, even able to psychically control other demons, even powerful demons such as Baalgars, but this may have been exclusive to the Spider Mastermind, which became the Dark Lord.