i was reading on reddit the purple mdma is just regular mdma dyed purple. a lot of people on the reddit site were having good experiences with it, but that obviously doesn't mean that it's the same stuff as you are getting.
i personally worry that even if stuff is tested that there is a chance there is a piece of fentanyl or whatever at the other end of the pill that isn't tested, but i'm probably just being paranoid. i've read on the net about fentanyl even being in fake adderall pills, but never anything about mdma... i used to just assume all my friends were taking it and it'd be fine when i used to mess with E... i'd probably just go with some shrooms or acid though, get a weird body high and some visuals too. i'm guessing a piece of fentanyl could get on some shrooms or acid too from the way it sounds. doesn't really seem like a thing though. sorry i am a fear mongerer. lol.