When the construction of the Dragon Tomb began, the panel recognized the structure, and thus, Du You's task level was bound to elevate further. Though it wouldn't raise his star tier, the invisible potential enhancement was still there.
There was no way to detect it, but nothing better could be done at the moment, so he might as well start leveling up.
After Du You submitted the task, he indeed felt the bottleneck disappear. In an instant, a surge of immense power erupted from within him, utterly uncontrollable, bursting forth like a flood breaching a dam.
Other people, after completing their tasks, would also settle for a period, trying to break through their own barriers to advance further. However, Du You and the two sisters, having amassed substantial power, naturally progressed to the sixth tier without even needing to pause. The immense power surged through him, and in a moment, Du You felt as if he could punch a hole through the sky.
