The dose for Bromo-DragonFLY is still fortunately too large to fit on a 1/4 x 1/4 inch piece of blotter paper (EDIT: Actually, after looking into this a bit more, I'm not so sure about this statement. I'll defer to someone with more knowledge, but until then take what I've said with a grain of salt.). It sounds like a primitive methodology, but in the absence of a testing kit, this small-sized blotter paper is a pretty sure sign that you have real LSD.
If you are offered larger blotter paper, it is very likely to be one of the NBOMe drugs, which are also not so safe in comparison to LSD.
I think you understand a lot less about this than you believe you do - this is pretty dangerous (tho not as bad as a comment above basing trustworthiness off label artwork)
If you are offered larger blotter paper, it is very likely to be one of the NBOMe drugs, which are also not so safe in comparison to LSD.
https://en.wikipedia.org/wiki/25I-NBOMe