C94 Xu Tengxiao's Trump Card.

The Sly Spirit Fog Formation was the only martial skill that Ye Qingchen had mastered that could fight against a cultivator of the Dao Comprehension Stage.

Once he used the Sly Spirit Fog Formation, it was equivalent to using a domain.

It could greatly buff himself and weaken the opponent.

Therefore, when facing an opponent like Xu Tengxiao, who had the power of a unique law