The B+ strain are notoriously strong yet seem to provide a nice mellow, level-headed experience. Allegedly invented by Mr. G — a legend in the mushroom cultivation space. Mr. G claims the B+ strain is a hybrid between P. cubensis and P. azurescens. The merging of cubensis and azurescens could explain the heightened potency of these mushrooms. Many people who use B+ shrooms describe the experience as calming, saying it was easier to relax and let the experience unfold.