As dawn approached, Wei Yuan—who hadn’t slept all night—was using the light streaming in from the cave ceiling to modify the wings. Whether the wings were slightly thicker or thinner, straighter or more angled, or even longer or shorter, each variation had a noticeable impact on speed and Dao energy consumption.

Wei Yuan tested them repeatedly, but the results fluctuated wildly with no discernible pattern.

Wei Yuan rubbed his face to shake off his fatigue before continuing his research. There had to be a pattern to the wing’s shape; he knew he couldn’t find it simply because his experience and knowledge weren’t yet sufficient.

Xu Wenwu had once said that the optimal solution to everything could be calculated. Of course, how one should go about performing such a calculation was a different story. Forget Xu Wenwu, not even Xu Wenwu’s teacher would know.

Immortal Lord Tinghai’s research did bear some resemblance to this, but the man had also mentioned in his writings that his research methods required the perception of an Immortal Lord—not even a True Lord could manage...