Look out for signs of mould. If the thing is any inexperienced mildew, white fuzzy mildew, or darkish black spots (mildew) about the mushroom, never try to eat it. Don’t fear if you see blue staining—This can be frequent in Psilocybe mushrooms and an indicator that the mushrooms include psilocybin.  https://psychedelicfarmmeds.com/product/dreamland-psychedelics-chocolate-bar/