Exhibition of all magic materia in the game. Some are just outright useless. Breach and Dispel are hardly used (not many enemies use buffs, and they're not that big of a detriment either if they do aside from Reflect), and Cleansing materia isn't really useful at all. While Binding and Time have their uses, well...that's a lot of MP you have to toss at it to keep it going, and on Hard, that might be a bit rough. Then again, depends on how you handle your MP!