I found this out several months ago, but i didnt put it out there because i figured that it was too useless to be used, although it was rather fun to me to see me getting beaten on by the scryer guards, and not get banished.
Aggro a guard, and fly just a bit halfway up to thier height, they will not reset, they will keep hitting you, and cast Banish, but it wont go through, and they will keep attacking till you till you move.
[Extra] Yes, i expect to get flamed for something this useless, but im still attempting to contribute what i can.