Why?

The New God was stunned at the sight of his own blood. Ever since he was born into existence he had never lost a battle. His father one of the more powerful Old Gods had given him some of his power before he left. So among the New Gods, he was among the strongest.

As he was in a state of confusion the New God looked at the smiling Ren. He had come here for the sole purpose of killing the Strongest Mortal Soul, proving that he a New God was better than even the Ancient Gods. 

He like all the other New Gods have heard stories of the Strongest Mortal Soul. It was said that any incarnation of the Strongest Mortal Soul, was always at the peak of all mortals. All incarnations of the Strongest Mortal Soul were born with an innate sense of battle. In front of the Strongest Mortal Soul, no one can claim to be loved by battle except for him. There were many stories of the adventures the Strongest Mortal Soul had.