This one time, way back on FFI for the NES, I had what I believe was my hardest and most frustrating battle. I had made it to Chaos with all my guys (Knight, Ninja, White Wizard, Black Wizard) intact and at Level 27, I think. Anyway, so I'm doing okay, thinking I got him beat and... he uses CUR4. Okay, no big, I can still do this. Until he uses it again. And again. Every time I did about 1000 damage to him, he would CUR4 himself. I got so pissed I turned it off and, one week later, went back and beat him.