Hearing Qingfeng Li's declaration, the Sky-Breaking Monarch's eyes lit up. He had been able to sense that Qingfeng Li's physical power was formidable. He was no weaker than the Monarch himself in that respect.
The Sky-Breaking Monarch knew that it would be very difficult to kill Qingfeng Li. Even if he did manage to kill him somehow, he wouldn't too much better off himself. Even if he didn't die in the fight as well, he would be heavily wounded.
The Sky-Breaking Monarch obviously didn't want to be wounded. There were many powerful people all over the Crimson Fire Continent who were eyeing his position from the shadows.
If the Sky-Breaking Monarch were to become heavily wounded, these people would no doubt appear to kill him. Then, they would stealhis treasures, his palace, his mountain. That was why the Sky-Breaking Monarch had to maintain a certain level of strength after killing Qingfeng Li.