Perhaps Fang Ze's own accumulation was substantial, or the first transformation of the Law Starry Sky was not inherently difficult. Anyway, after completing the first circle of steps, Fang Ze felt some pressure, but he could still manage.
So he continued to climb upward.
Soon, the second circle of steps was completed slowly. By the end of the second circle, Fang Ze started to feel exhausted.
However, he knew he hadn't reached his limit yet, so he forced himself to keep climbing upward.
On the third circle of steps, Fang Ze found it even more difficult. It took not only longer, but by the end, even with Bai Zhi's talent, Fang Ze started to feel his body wobbling, and he couldn't stabilize his footing on the steps.