C384 The Thirteenth Floor

"What is this?"

Chu Bing asked in confusion as she looked at the green dragon behind Zhang Nan.

However, no one answered Chu Bing, because Lingling did not understand at all, and Zhang Nan was still cultivating.

Not long after, Zhang Nan opened his eyes and saw Chu Bing looking at him.

"What's wrong?"

Zhang Nan asked in confusion.

"Just now, a huge green dragon phantom appeared behind you