After a look at the FAQs and the forum I did not find an answer, but maybe someone here can tell me.
Holy Aura (8th level cleric spell, core rules) has an effect that blinds evil creatures striking those protected by it.
How often does that happen and has to be saved against? Would that apply to every strike out of a fullround attack? Does it only apply once while the spell runs against each opponent? Should it work per protected target on a given monster or is one save enough to negate the effect completely for that mob (and that specific spell)?
For reference:
Finally, if an evil creature succeeds on a melee attack against a creature warded by a holy aura, the offending attacker is blinded (Fortitude save negates, as blindness/deafness, but against holy aura's save DC).
An evil creature would have to save against blindness every time they successfully attacked a recipient of the spell. There are no limits to how many times it applies. It doesn't call out something like "once per round", "once per evil creature", or "once successfully saved against, a target is immune to the effect for X amount of time."
An evil creature would only not be affected if they were already blind.
Thank you.