The official answer from support to the question why i`m always getting/see YYBS at +13 stat: There are other possibilities besides the ones you mentioned. Empty Soul 1 Increases Attack Success Rate Increases Dodge Rate Increases Chi Kung Success Rate Increases Chi Kung Dodge Rate Increases Attack (Physical) Increases Attack (Chi Kung) Increases Max Life Increases Max Vital Energy Increases Strength Increases Essence Increases Wisdom Increases Constitution Increases Dexterity Absorbs Attack into Life Absorbs Attack into Vital Energy Increases Movement Speed Increases All Attributes Increases Item Drop Chance Increases Attack upon Critical Hit Increases Critical Hit chance Increases Max Weapon Attack Increases Gold Coin Drop Chance Empty Soul 2 Increases Yin Attack Increases Yang Attack Increases Soul Attack Increases Body Attack Increases Yin Resistance Increases Yang Resistance Increases Soul Resistance Increases Body Resistance Increases Weapon Attack