"Growing like tumors in the midst of a demon infestation, the Nests spread their progeny across the cursed lands of Zagoravia. Scriptures claim that demon Nests could spew out spiders in an uncontrollable stream of flesh until the end of the world. I have found the hard way that the only way to put an end to that is to slay the nest."
Spider Nests spawn Spider Hatchlings, Lava Creepers or Frostcrawlers, depending on the Nest's color. The Nest will spawn spiders until destroyed.