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Critical Failure and spells that use all your remaining AP If you get a debuff that increases your Crit Failure and you cast a spell that uses all your remaining AP, you will not lose any AP and can try again until it works making the Critical Failure debuff useless against characters with such spells.

At least the Ecaflip Spell "All In" doesn't use any AP if critical failure procs but I don't think it's the only spell so it would be nice if someone else could test other "all AP" spells while having a critical failure rate.

I think that spells that uses all AP remaining are able to use again if it gets failed, since i have the fire spell "Temporal burn", that uses all AP to do damage! I will try to see this to u!