Watch out for signs of mildew. If the thing is any green mildew, white fuzzy mildew, or darkish black spots (mildew) on the mushroom, never try to eat it. Don’t worry if the thing is blue staining—That is popular in Psilocybe mushrooms and an indicator that the mushrooms have psilocybin.  https://psychedelicfarmmeds.com/product/dreamland-psychedelics-chocolate-bar/