Judging from what Zhang Yi said, Duan Lingtian learned that even though Zhang Yunfei had mastered the immortal technique "Destruction Immortal Thunder" and possessed strength comparable to a four-tribulation loose immortal, he was still unable to obtain an immortal supreme treasure from the Heavenly Master Sect because his older brother had already claimed one, and the sect did not have a third such treasure.
Consequently, he had no choice but to strive for an immortal supreme treasure on his own.
Now that he learned Zhang Yi had an immortal sword in his possession, he naturally would not let the opportunity slip by.
Chapter 2431