Re-tested Barbarians a little bit: Further investigation on a bug: the non-improved Barbarian feats that add damage to attacks only fail if you don't have Tireless Rage and Great Rage as feats. There's no documentation for this. Additionally the feats that improve the aforementioned feats to do more damage, don't improve them and in fact they stop working after. (Will correct the previous bug report regardless) [Fixed] Supernatural Fury doesn't seem to work. Magic resistance is un