Myconids and moldies are both fungus-based, though, so they share similar environmental wants. Blights are corrupted creatures infused with necrotic energy, so the land they create won't sustain the fungus that moldies feed upon or sprout from. Basically, to paraphrase, they represent different kinds of corruption, and they're mutually incompatible, whilst myconids represent the same kind of corruption and thusly their ecosystem is "friendly" to moldies.Wait... weren’t ‘expansionism’ and ‘shaping the environment’ the myconids’ entire schtick in 4e? You’d think that would make them mortal foes.
In official sources. Moldmen were in Tome of Horrors and Glades of Death from Necromancer.Meta-History of the Moldies:
A sidebar states that moldmen first debuted in the AD&D adventure "S3: Expedition to the Barrier Peaks", and from here made it into the 1e Monster Manual II, then 2e's Monstrous Compendium (by my own limited knowledge of AD&D's supplements, I think they mean the MC Volume 1, which was later reprinted as part of the Monstrous Manual). After that, it claims, the moldies vanished until Gamma World 7th Edition brought them back in the adventure "Famine in Far-Go".
Finally, the article closes with a new Level 26 Minion Hazard; the Demonweb Doomspore. These large, phosphorescent mushrooms sprout from the corpses entangled throughout the webbing, and explode when exposed to combat, filling the area around them with a powerful hallucinogen that drives creatures to turn on and murder their allies. Nasty stuff.Lolth’s Twisted Web
Among all the villains an adventuring party might face, Lolth is unique in her dedication to deception. High-level characters and experienced players know that every word the Spider Queen speaks serves her interests. Even so, Lolth rarely engages in direct trickery, knowing that the most insidious way to betray ambitious adventurers is to tell them the truth. She offers characters what they want: treasure, the solutions to quests, or hints of how to destroy powerful demon lords and gods. When you incorporate Lolth into your campaign, remember that her webs of deception are so thick that they twist around the truth. Lolth might end up becoming an adventuring party’s most beneficial ally for a time—but you can be sure that this alliance benefits Lolth in the end.
There's ones in the MM2 without the demon subtype. They're flavoured as constructed created by the Primordials, although it also points out their programming gets subverted by demons reasonably regularly.Is there such a thing as a normal Retriever in 4e?