The Everlasting Wood Art is a method to draw mana of the wood element from the environment, store it into his body, refine this energy, and use it to transform his life force too.
Those are the four steps involved in the cultivation technique. Most cultivation techniques only do three of these steps, not four. They don't refine life force too.
It is abnormal that the Everlasting Wood Art refines internal energy and transforms life force. But not only does it do the two of them, it does each one better than most techniques that only refine one thing.
The Everlasting Wood Art is top-grade cultivation. That means it has a higher efficiency.
When using the Everlasting Wood Art, more of the mana taken from the environment is used for refining than other techniques. The exact number is based on the technique itself and the grade of the life essence used to break through to the second mortal coil.
