For mine, I had to draw a monster called a "niter" based off of his description: "Niters communicate in whispers. Nocturnal. Shy away from light. They’re black and oily and emanate a bluish glow. Large, looming 6 foot shadow things with massive hind legs, clawed for climbing trees and they have ‘maws’ instead of arms, claw-like appendages they stab people with and only one gaping blue eye. Their mouths open up and they swallow their victims whole."
What's funny is that I didn't see the fact that they emanate a bluish glow until now. So, the glow from the eye is purely by coincidence. Figuring out the hind legs of this creature was difficult, and so I sought reference images, and of all things, the koala turned out to be a pretty good reference.
For a while, there, it was looking like Carnage from Spiderman, but I toned down the reddish-hue a bit. The intention was to give the appearance of motor oil.
So, now to find out how badly I failed at drawing this...
This art trade was fun, though, and I would do a similar one, again. But I am le tired.