Shen Ruyan's own strength was already very close to Dao Mastery, being at the peak of Dao Fusion.
Originally, Jiang Chengxuan had also reached the culmination of Dao Fusion before he chose to break through to Dao Mastery.
The likelihood of a successful breakthrough for those who reach completeness is inherently higher than for those who force their way through.
With Jiang Chengxuan's protection and the Thunder Dao Fruit aiding her, both Jiang Chengxuan and Shen Ruyan were fully confident in her breakthrough.
However, such an endeavor was inherently risky and not to be taken lightly.
After briefly testing the waters of the breakthrough, Shen Ruyan chose to pause.
The power of the Thunder Dao Fruit had already bridged the last gap in her cultivation.
Her state was completely peaked, even more so than Jiang Chengxuan at his time of breakthrough.