Gem Box + Economizer +Quick + Ultima = Infinite turns for Terra until Kefka dies and everybody survives with nary a scratch.

I just beat the game this way. It's very unsatisfying. I have to go back and do it all over now and try to find a way to make this more difficult on myself without feeling a little stupid for not using all the resources at my disposal. Or something...

Anyway, cool that this works, yeah?