In Greek mythology, the Chimera was a monstrous fire-breathing creature of Lycia in Asia Minor, composed of the parts of multiple animals: upon the body of a lioness with a tail that terminated in a snake's head, the head of a goat arose on her back at the center of her spine. The Chimera was one of the offspring of Typhon and Echidna and a sibling of such monsters as Cerberus and the Lernaean Hydra.
I didn't make it exactly like the description. I gave it three heads, resembling those of a goat (on the right, left for viewers), a lion (middle) and a snake (on the left, right for viewers). I would've used a black Rahkshi head for the snake head, but unfortunately I don't have any of those. And I know Mantax' head doesn't look much like a lion's, but it's the best I could find. Instead of the snake head, I put a large blade on the tail.
This MOC was a little tough to build, mainly because it took me over an hour to find a way to attach the armor. That, and the parts kept breaking (sigh).