Psilocybin, or magic mushrooms, a group of fungi that have been used since prehistoric times as an entheogen and hallucinogenic drug. The substance psilocybin is found in a variety of genera, with over 100 species in the genus Psilocybin, though the mushrooms of that genus usually don’t produce hallucinations.
Psilocybin causes an increase in empathy, euphoria, and altered thinking. In some species, it can cause open and closed eye visuals.
Though they aren’t chemically addictive and they don’t represent a significant health threat, they are hard to distinguish from deadly mushrooms. Toxic species like Death Caps can look identical to some species of psilocybin and grow in the same places.