Does erase work on this? During our fight today I asked a few times for erase whenever I got terror and it never seemed to work, or maybe they were just slow. I've fought Fafnir before but for some reason I don't think I was that picky about being terrorized since we'd always have 3-4 tanks at it, but today had just 2 tanks and 2 whms.
Ended up wiping at 5% anyhow.