Actually, Rein had overestimated Bai Pu.
The main reason was that Bai Pu frequently slew monsters of a higher level, accumulating 76 Celestial Human Attribute Points! In addition, the Celestial Descent State could double these points, all allocated to Power, resulting in a total of 152 points, a number more terrifying than that of many Power-type Advanced Awakened.
Adding to that were the King-level Purple Weapons and the Winged Tooth Beast King Da Fei providing the Man and Horse as One, under full power outbreak Bai Pu's Power more than doubled, plus the Professional Passive Tyrant's Fury, allowing him to compete in strength with a King-level powerhouse with 50% enhanced augmentation—a.k.a. Emperor Yan (Great Dark Heaven)!
Nevertheless, Emperor Yan was also truly formidable.
Even when he couldn't compete in Power, he was still able to use various intricate Force-Neutralizing Sword Techniques to guide and deflect Bai Pu's stabbing positions!
