Necrophidius

Though literally called a death-snake, the necrophidius is not an undead creature. It's actually a construct, made up of snake and human bones (most notably the skull), created as a guardian. The serpentine form is possible the second most popular shape for constructs (the first being humanoid). Like other snakey constructs, the necrophidius' main tasks are guardianship and assassination. Despite the lack of visible venom sacks, this creature's bite injects paralytic poison. Should it be spotted before it gets within biting distance, the necrophidius is able to perform an undulating dance which hypnotizes its target.

So this one was a tricky one to draw. If I'd been smart, I'd have gone for the much more simplified and bendy vertebrae that Joe used in his devourer image. Silly me, I decided to go with less flexible, much more numerous vertebrae (with disks!). That's my excuse for this late image, at any rate.