An adversary for Heart, the City Beneath.

Glowing in a strange syncopation with a myriad of colors, these tiny worms form colonies of thousands. The vibrant pulsations hypnotically draw people in with a sensation that the worms are trying to communicate some dire warning, ancient prophecy, esoteric wisdom, message from god, or a get-rich-quick scheme.  Delvers who fully succumb become certain that only by lying down and letting the worms crawl over them will they be able to understand the message. Slowly, the worms digest the unwitting victim.