Cordyceps fungi is a common ingredient in Chinese herbal medicines. In general, mushrooms wouldn’t seem like an obscure ingredient, however, this particular mushroom grows from the bodies of insects. If a spore lands on an insect, it can infect it. The fungus then grows within the body, using the internal organs as a food source. Eventually, the fungus rips out of the insect, distributing more spores.
What does Flugs face look like in the Parasite au? I really like your art style BTW!