Blades That Cannot Be Seen

She gazed all around, finding that the walls were covered by hundreds if not thousands of sword slashes. In fact, it was probably much more than that. 

"This room must've been smaller than before, it just expanded by the constant training, Whoever used this place, practiced so much that they shaved away at the walls to the point where they don't even exist anymore!" she realized. 

But that wasn't all that Ming Yue found. 

There was a certain energy permeating the walls, sharp and swift, resembling that of the Sword Dao. 

Although she was excited, she quickly realized something else. 

"Whoever trained here was weaker than me but their understanding of the Sword Dao is greater than mine. I could gain from practicing here", she thought to herself.