C124 How do you practice

"It's too difficult, I can only last for three breaths.

"If the battle does not end within this period of time, and the spiritual energy is exhausted after three breaths of time, I will be at the mercy of others." Ling Yun smiled bitterly.

The sword technique he used was called the [azure lotus Sword Art], and it was a earth-grade martial skill. It could be attacked, blocked