By concentrating hard enough, he could feel the world around him slow to 0.5x, or even 0.3x speed. From his perspective, every action became much slower.
This meant he had double or even triple the reaction time. When other people couldn't react in time and had to rely on instinct or muscle memory, Fang Zhen could calmly and consciously choose to dodge or attack.
In this state of highly concentrated Spiritual Power, it was impossible for an arrow to hit him.
Furthermore, if his observational skills were sharp enough, he could even dodge a pistol shot just by reading the tell-tale movements in the shooter's hand and shoulder muscles. He wouldn't even need precognition.
After his Constitution reached 22, the abilities Fang Zhen gained were near-total immunity to toxins and the elimination of his weaknesses.
With a Constitution of 22, Fang Zhen no longer had any true weaknesses.
