The bearsarkergang is brought about by working oneself into a rage. It brings upon the user an insane killing rage that raises his strength and constitution but lowers his intelligence and wisdom. He also becomes somewhat immune to fire, so great is his rage, but he is completely unable to flee combat. In addition, the rage is so great that his charisma suffers during this time as well. Races which are carriers are immune to mental disease are unaffected by this killing rage!
Skill is currently broken as in your stat bonuses will revert after some random time, but not the maluses