Although that emerald-green short blade can also slash open cracks in the Dead Zone, it requires Divine Power to activate, which Li Fei cannot use.
As for the two Break Domain Talismans he brought in, they were already destroyed inside the 'Dark Cloud Sky'.
So Li Fei can only use the New Heaven Association's Break Domain Talismans to leave, which makes him somewhat regretful.
Only a Great Grandmaster can create a Break Domain Talisman, and based on the New Heaven Association's two Break Domain Talismans, it's possible to trace back to a Great Grandmaster within the New Heaven Association!
Of course, it's also possible that this Great Grandmaster is Xu Jing, which is what Li Fei would most like to see.
Regrettably, Li Fei can only use these two Break Domain Talismans now.
Of course, he could also choose to kill Ye Zhao and take an extra corpse and a Break Domain Talisman out.
But compared to a dead object, Li Fei finds a living person to be more useful.