Arokhslair.net

I've entered this cave in ravenshold, and killed everyone. I also found this blue or purple barrier, and near it there is a great jump. To enter the barrier I also tried to enter it from above (there is this place where you can drop down) what is this barrier, and that bow?

Hmm I think I know what you're talking about. Its some weird barrier that if you touch it you die. Hmm. If my memory serves me you have to go to the floor above it and fall through a whole. I think there's some explosive that triggers the hole on the floor. If not then look for a switch to take out the barrier.

you have to drop down perfectly in the center and then pull the lever in the middle you get the hoarfrost bow for doing this which shoots frozen arrows