One move to kill

A black flag was suddenly raised around Tang Zhen.
A mysterious light emanated from it, wrapping around him and blocking the powerful backlash force.
The shock wave swept over like a beast that was about to tear everything apart.
Heming's sword suddenly came out of its sheath and drew a line in front of everyone's eyes.
The sword seal was hundreds of meters long and wide, forming a sword energy barrier.
The shock wave hit the sword energy barrier, making a series of muffled sounds,...