I managed to wriggle past it finally. Quen wasn't effective for me, because when I got hit, it tended to be because of having one in front and one behind or being cornered. In other words, I'd get hit more than once anyway. I used the magic trap instead, because it would let me wail on one if it happened to get separated. Keep in mind I'm playing on "You Have Something Wrong With You If You Choose This" difficulty.
Bookmarks