The Antwark.
A creature of nightmares, especially to the one whose feet were on the ground. The Antwark was a colossal beast that lived in the deepest recesses of the earth. They resembled normal sandworms, except they were a billion times larger, stretchy hundreds of feet in length and with an enormous body capable of burrowing through solid rock with ease.
The surface of the Antwark's segmented, sinewy body was covered in thick, chitinous plates and they shimmered dullishly with a reddish gray, just as red as the Red Rocks itself. These plates provided the beasts with protection and also gave it an intimidating presence.
There were tiny bristling spines lining the body, invisible to the mere eye but assisted the beasts in navigating the subterranean world with ease and speed.