C834 Incomplete taiji shadow
An arm being chopped off shouldn't be considered a serious injury to an immortal.
The long sword in Li Ren's hands were originally a Supreme Destruction Sword. After its arm was cut off, the only thing Su Qin could do was to chop off a piece of its flesh and bones at the foundation of the severed arm. Otherwise, if the true intent of destruction were to enter the body, that would be a problem