As the Boundless Heaven's titled Celestial Emperors who were assassins, Dugu Wu and Dugu Wen did not simply accept assassination jobs. They only dared to kill those without extraordinary backgrounds, connections, or powerhouses. If it was not absolutely necessary, they would not kill Xu Lang, the Verdant Prairie Celestial Emperor, in fear of offending the Heavenly Pool Palace. In fact, even killing an ordinary disciple or a prodigious disciple carried the risk of offending the Heavenly Pool Palace. Therefore, accepting the job to kill Duan Ling Tian came with certain risks. Who knew if the Heavenly Pool Palace would send all their titled Celestial Emperors after them.