Wytwyld's Dawn of Worlds Experiment
Mushrooms mushed together and granted sentience by Fervus. These bipedal mounds of fungus serve one purpose and that is to poison the rest of the world. Each Thallid has its own natural poison which it excretes but they all serve the same purpose. Thallids wish to lull any living creature into a peaceful state of being either through hallucinogenic fantasies that rot their minds or through the simple method of death.
Thallids still form societies that function somewhat normally but their zealous religion of poisoning the world is their first priority. All acts move towards this goal and societal structures are simply tools which lead them onward.
Thanks to Fervus’s blessing the Thallids are the greatest potion makers and alchemists in the known world.