Advanced Potential Scrolls suck >.> I have used three in total. The first one worked on my knuckle. The second one blew up my overall. It was a 21 str 6 dex pirate overall, and it pissed me off so much when it exploded. The last one was used on my Reverse knuckle. It was 2 attk above, with +3 str and dex. Used the Advanced Potential on it...and KABOOM! It exploded. I wasn't pissed off with the last one though...I had a feeling that it wouldn't work :O And yea, most likely that the Advanced Pot scrolls are 90%, but from my limited experience they suck (I've had more luck with the 70%s). And we need to keep reminding ourselves that if we do take a risk, we need to bear the consequences...