Zhao Guang also understood that the reason was that his main body was spiritual power.
When one's spiritual rules are already formed, creating a new rule naturally has its difficulties. Moreover, the greater the number, the greater the pressure would be.
This is why it has never been heard that anyone truly dual-cultivates two types of rules to reach the legendary level.
Even for a creature like a giant dragon, although Combat Energy and Magic Power can be cultivated together, after reaching the legendary level, there is only one rule.
With his own foundation and strength, Zhao Guang could only withstand the pressure to mold two rules into one body. Creating a third one is basically impossible, and there's neither the time nor energy for it.
Of course, it might also be because his Combat Energy rule is too strong.
If it were weaker, perhaps he could truly create three rules.
But that would be meaningless; two weaker ones combined are no better than one strong one.
