It has a body very similar to this one, only the front part is hollow, & Khamsin attaches to it in the middle at his waist (he apparently has no legs.) It has wide set shoulders with somewhat mantis shaped arms, ending in four-fingered hands, which he uses to hold a chainsaw-axe type weapon. The legs look kinda like werewolf legs, with a set of long feet with three stake-like toes, two in the front, one in the back. On his back is a rocket propulsion system, with a similar type of rocket system on the back of the head of his weapon, to allow for better locomotion & swing speed.
If you go to Youtube & look up "Khamsin cutscene," the second result will give you a good look at it (it was the second one for me, anyway)