What do scrolls do to items? What’s the difference between using a 100%, 70% and 10%? What’s the most effective way to use scrolls? I can’t really think of any more questions, but if anyone answers all of them + gives more information I’d be thankful.
To put it basically: It’s just RNG.
The less likely the scroll is to succeed, the more benefits you’ll get if it does though.
It turns out I was a tad bit really wrong about how scrolls upgrade your weapons. The amount added is most likely based off of the base damage of your weapon. I still do not know exactly how much they increase, but I made a post about it that contains a spreadsheet with all of the weapon upgrade info. Feel free to check that out if you want to learn a bit more!