Chapter 1249 - Chapter 233 Heavenly Eye Forge Knife's Soul (Part 2)_2

With the assistance of his spiritual power, the Innate Qi condensed within the bodies of the Seven Sword Souls was still slowly being absorbed. As their strength increased, it became harder and harder for Nian Bing to control it. After all, the Innate Qi which Nian Bing had infused into their bodies was within his power to control. However, the stronger the Sword Souls were, the stronger their resistance to external spiritual power became. Therefore, as control became more difficult, Nian Bing had to exert increasingly more spiritual power. When he had expelled up to ninety percent of his spiritual power, he stopped controlling the Innate Qi; otherwise, if he expended all of his spiritual power and couldn't retrieve it successfully, he would certainly suffer the wild backlash of Innate Qi, and the loss would outweigh the gain.