Fly amanita (Amanita muscaria)
In raw state its toxic and contains psychoactive substances. Possible to de-toxicize and eat. Psychoactive substances are unpredictable, so everything from hallucination to berserek rage is possible. Used in many cultures for its psychoactivity and relative low toxicity.
To die, eat 15 large shrooms.
To not die, take just picture of it..