FFI wiki icon The Intelligence bug is a bug found in both the NES and PS versions of Final Fantasy. In the game, Intelligence is supposed to be a factor in how much damage or healing a spell will do, or how effective it is, but is never factored in, essentially meaning that a Red Mage can use Cure just as well as a White Mage, with neither being better at it than the other. This also means that magic spells never become more powerful, with any given magic spell being just as powerful when cast by low-level or high-level characters. Combined with the Critical Hit bug this results in magic being overall less powerful than physical attacks.