Does anyone know of a spell that protects against aligned damage (holy, unholy, chaotic, lawful) as Energy Immunity does vs energy damage? We're about to face a black slaad. Very nasty.
The only way I know to avoid aligned spells is to have at least 6 levels of Horizon Walker, and take the "Aligned" planar mastery. That makes spell effects treat you as if you have the alignment of whatever plane you're on, which makes it lots easier to fight outsiders on their home turf.
I don't think you need to be on the plane to use it. After all, it mentions not being affected by spells that affect characters of a certain alignment, such as unholy blight. I think it works wherever you are.