Student Belt Recipe = Almost infinite Crystals

[camelotcrusade]

I am actually a little surprised that recipes aren't one-use items. It makes sense that you could write them down though, and it's too bad you can't add them to your book. The second crafting dialog says "Add the magic recipe." I thought it would put it into a new recipes section of my spellbook, but that's apparently KB-speak for "close the menu."

[Xargon]

I already imagined that the upgradeable, craftable Silver Rapier (which I got early in my current game) would be broken; nice to see it spelled out... but of course, taking the (real-life) time to abuse this exploit seems rather silly, and it is probably a lot more satisfying to earn the various achievements one can get elsewhere. I can't imagine that it will feel like an accomplishment this way...

Still, yet another example of a game mechanic that was poorly executed and/or poorly tested. Maybe making recipes disappear after one (or a few) uses would be a natural solution, even if it doesn't really make sense.
edit: Right, I completely missed that this was mentioned right above this post. Shame on me.