His inner strength is primarily the Blood Asura inner force, while the strength possessed by the natives in this world is a form of energy that is neither inner strength, mana, nor magic power.
This inner strength seems attribute-less, yet it exhibits diversity, allowing them to easily utilize various attributes of strength.
However, using it requires some technical skills to convert the power released by oneself. Zheng Yichen's conversion is different from theirs.
Trying to directly recharge like the locals is somewhat difficult, additional procedures are needed.
The simplest and most straightforward method is to use the Divine Domain, which can directly absorb the energy from high-energy crystals.
It's not too difficult, Lilith attempted it first, purely to slightly optimize this step.
If optimization is not needed, it can start immediately.
