This minor scar might not have been significant in the beginning, but as he continually increased his strength and refined his skills, the damage became larger and more significant, eventually becoming a critical factor affecting his cultivation.
The path of cultivation is essentially a transformation towards perfection, an evolution towards the perfect life. The presence of a Dao injury represents a flaw in this perfect life. Even if it's just a trivial flaw, as evolution continues, it becomes increasingly conspicuous and increasingly significant.
Therefore, the Saint Lord of Wind and Thunder wished to cultivate anew. The method he chose was based on the perspective once proposed by the Longevity Taoist Monarch, to evolve a God-Devil body, using his own Laws of Wind and Thunder as the foundation, to forge a body of Wind and Thunder God-Devil. This would enhance his natural talents, making him stronger and more potent, with greater potential to reach further in the future.