After exiting the arena, Shen Xu and Zhen Yuan rented a training room and went inside.
"Are you okay?" Zhen Yuan asked, noticing the double's pale face.
"I am tired." Shen Xu said and Zhen Yuan raised an eyebrow.
"Your runes are powerful but they also burden the body. I only endured for so long because i am a level fourteen body cultivator." Shen Xu explained and Zhen Yuan couldn't help but frown.
He already knew that using the runes on Shen Xu would more or less tire the double.
However, he didn't expect the exhaustion to be so significant.
'There is no free lunch in this World.' He thought and sighed.
"It's enough to know that the method it feasible. We can use it in urgent situations." Zhen Yuan said and the double nodded.
"You are right. It's not a good idea to get used to it." He said and quickly continued.
