Superficial without depth?
Hearing this term, Su Mu's eyes lit up slightly, and he immediately asked, "Thunder God, what rule is this 'Natural Secret Technique' suitable for refining?"
"Suitable?" Thunder God gave a cold snort, "This secret technique is not suitable for refining any rule, at best, it can only refine."
Noticing the interested look in Su Mu's eyes, Thunder God continued.
"The secret technique suitable for a rule can greatly amplify the power of the rule. You, kid, are best at the Rule of Fire, and in terms of the Rule of Fire, the 'Vermilion Fire Secret Technique' is top-notch, if not the very top.
Even when refining the semi-Origin Rule of Fire, the power of the 'Vermilion Fire Secret Technique' can be at least thirty percent higher than this damned secret technique, and this is just in the early stages. As you progress to the later stages, the gaps between secret techniques become more apparent."
