the Stone Dragon or Black Stone along with several others that Stone has done come from the Purple Jem and was specifically bred FOR pain over many many years to thats why its such a specific med that actually does work. and ppl call them meds for the simple fact many(including myself) dont wanna say,herb,pot,weed,but meds works and they all have a small amount of medical properties. but only a few have truly specific ailment priorities with full on guaranteed results. and its also one of the more versatile strains as well. you can tune is just under cloudy trics to fully amber and never loose its medical properties,and they can be tuned to potency and specific uses within diseases ,which not many can truly say that.and THAt is what ultimately makes the dragon line a true winner for actual ailments and diseases as a true cannabis medicine. I have been using it for years and years (among others from the same breeder too) to help with my pain and Multiple Sclerosis.and also known and do know multitudes of individuals whom use it with outstanding success,like me. happy growing man!