Talk:Great Magic Barrier/@comment-24373527-20150122211041/@comment-4511886-20150122213150

From what I've gathered, it's a straight 90% damage mitigation. So you don't actually get any defence from it. You just ignore 90% of all magic damage taken for the duration. I believe this is calculated after defenses, so having high magic defence with GMB can almost grant immunity to magic damage.