Was just trying Cail the Silent and got all the way to badly injured for him and suddenly all my characters had a frightened debuff. I managed to last for another minute and a half, but it was impossible to hit him because of it, and it appeared to be permanent. I've never had that happen before, and I'd think if it were MEANT to last the rest of the fight it would be nigh-impossible to beat Cail. I am incredibly frustrated, having spent 20 minutes fighting him, making sure every character was doing the right thing at the right time, and... Bam. Screwed. Never seen this before.