Luck and what it affects

[Kobal2]

Originally Posted by JonBrave

While I think of it, your question could also be asked of, say, Twist Fate? (Does that come later than Luck? I suspect it does...)

Wait, that's the one I tested against Magic Duel, not Luck ! Sorry, my memory's hazy.

So, anyway, datapoint: Twist Fate does nothing whatsoever to prevent the 999 damage you get from failing a magic duel.