The arrow has left the bow, and there's no turning back—this was precisely the situation for Xuan Ku now.
He had countless opportunities to kill Su Xin in the past, yet he squandered all of them, and now this was his final chance—he couldn't give up, nor was he allowed to give up.
Xuan Ku planned to combine the power of the Four Divine Bridges to kill Su Xin. He had thought this was a surefire success, but as White Lotus Holy Mother and Ying Qiange had worried, Su Xin was not so easily killed. In fact, for someone like Su Xin, even if you really did slay him on the spot, there was a chance he could use all kinds of mysterious secret techniques to come back again.
Even with the five Great Demon kings of the Demon Race standing before him, they could not deter Xuan Ku's determination to kill Su Xin.
Today, since Xuan Ku stands here, there are only two outcomes: either he kills Su Xin, or Su Xin kills him. There are no other options.