Illumina...? How and where?

My Ragnarok is at 550+ strength for Locke's attack right now when he has on the relic "Gauntlet".

@Levian: So you haven't played FFVI because you are right before the Wrexsoul fight on your data save and can't move on? Ouch. I usually make a separate save file on my card just before heading into something like Cyan's Soul in case I find out I'm not strong enough to complete this part of the game at this point. Then I'd revert back to my last save spot on the worldmap and level some more. Sorry to hear you're in a pickle. Yeah literally; no for real. Good luck with that one!