The Ecology of the Deep Dark Cave Worm

From publisher blurb: This bonus bit of content is a description of a new "monster" that was the initial inspiration for the Tweak & Toss "mission" The Wizard of the White Hills. This creature, while technically a monster, isn't intended to be a serious challenge to any party, but instead just a bit of background on an obscure creature that links two vastly different campaign areas. This information might be useful in the above Tweak & Toss, or you might find some value if your party is underground and trying to get out.