-twisted-: For example lv 40/ sharpshooter skill - adds % to damage &/ or dex.. When learned and used with bow and quiver.. Melee weapon skill adds boost again I think dex &/ or damage.. Enchanter/enchantress adds wisdom.. You can only choose 1 of these "perhaps earned from old quests..sharpshooters,enchanters etc" perhaps lv 60 then you can learn a new one or upgrade at lv 80 and 100