I legit found the best z soul in the game called... If only I can just reach my perfect form...! It has max increase to all stats can only be obtained from mixing z souls I'm your brother and I'm not gonna be that easy! But with the good is also the bad the description reads cells 2nd form z soul equipping the soul auto charges ki and a large increase to all stats is gained but when health depletes a large decrease to all stats comes into effect.