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Does it remove your buffs, too?
I tested with deep protection, magic barrier and lightning weapon. As far as I can tell anything already cast will not be removed.
This is fun in group PvP. Nothing like setting that up when you're against double casters and watching them cry after they lose.
Does it work the same with low intelligence?
This spell doesn't scale with anything. At all. So intelligence doesn't matter. Faith doesn't matter either, as long as you meet the requirement.