This strain of blackhead (Psilocybe cubensis) is a species of psilocybin mushroom of moderate potency whose principal active compounds are psilocybin and psilocin.
There is little doubt that if you have explored the differences in potency between different strains of psilocybin-containing mushrooms, you have heard about penis envy. It is somewhat common knowledge that the penis envy strain of magic mushrooms, is unique in that, along with being shaped like a penis, it is more potent than the average Cubensis mushroom.