Generally, there are three methods to cultivate the Tai Chu Divine Body.
First, is to temper one's body under different degrees of injury, gradually making it stronger. However, this method is quite risky, and many cultivators will not choose this method to train their Body Cultivation. Just like Yang Chen, his bold move to fight with Long Speedy Eagle.
If it were someone without confidence, even a slight mistake could lead to death. Without life, there is no need to mention cultivation.
Second, is to use the blood of different strengths demonic beasts, like the Black Mountain Black Bear and so on. Unfortunately, Yang Chen had already used the blood of the Black Mountain Black Bear once to refine his body, and the effect would not be significant for the second time.