Mu-Gun recalled formulating an unparalleled sword technique in his mind. He called it Ultimate Thunder Sword, a technique that condensed ten thousand Infinite Thunder Swords into one.0

In theory, the Ultimate Thunder Sword was capable of exerting ten thousand times more power than the Infinite Thunder Sword but naturally required a great deal of internal energy. Hence, Mu-Gun had never dared put it into practice.0

Absorbing the energy of the four Spirit Kings had made the technique usable. However, using something he had never used before in combat posed a lot of risks, especially since his opponent was the Demon God. In this fight, he could not afford to let his guard down for even a moment.0

The moment he made a mistake and failed to bring forth the Ultimate Thunder Sword, he would likely be rendered helpless against the Demon God. To reduce the risk a little, someone would have to hold off the Demon God until he was done conjuring it. Fortunately, he had the Dragons with him. They could hold...0