Larval mass

"In the dark corners of Alluvia live creatures that individually resemble small white larvae, but when they congregate they form into mobile humanoid shapes. Some call them larvalids, but that word is foreign to most everyone, as the places where they occur are so out of reach and uninhabited that barely anyone has experience with them, and that is likely for the best. Some texts describe the places wherein they dwell as being damp caves and places where there is plenty of rot. The entrances to their abodes are usually covered in what seems like thick spiderwebs, however lacking the intricate designs that they tend to have.