Long Siye's condition was far worse than he had thought it would be. Long Fan's soul seemed to have merged with his, and their souls could only be separated with a particular technique. He had not figured it out just yet. He hated Long Fan. He would turn his soul into ashes at any opportunity.
It was not difficult at all to destroy Long Fan. However, before their souls were entirely separated, killing Long Fan meant that Long Siye would be killed, too.
He had to keep Long Siye alive, for he was one of the heaven's gift disciples. Moreover, even if he was not a heaven's gift disciple, he was Gu Xijiu's most precious friend. She would be devastated if he was killed. He did not want to hurt Gu Xijiu. Also, he should keep Long Siye alive to be her valuable assistant in the future.