I'm looking for a natural hallucinogen available in northern Europe in 500 BCE.
I have a bog body that's ingested this prior to death. i want something not detectable in the bog body in 2020. Some chemistry that doesn't preserve well
Ergot can be detected in a bog body. What about black henbane, belladonna, fly agaric, cannabis, opium, datura, sweet flag, mandrake, ... some kinda mushroom?