The most important thing is that, once the Sky-opening Axe was repaired to its full potential, embedding the five Great Open Heaven Axe Souls into the five Innate Supreme Treasures, it would be possible to consolidate the true essence of the Sky-opening Axe. Its power was so immense that even Xin Yun couldn't imagine it right now.
Not to mention anything else, although Po Kong wielded the Zhu Xian Four Swords, the Four Great Sword Souls still existed. They were continually refining Innate Sword Qi and cultivating their own energy. In some sense, what the Five Directions Heavenly Emperor held were merely replicas. The genuine articles would need to be infused with the essence of the Sky-opening Axe.
