"This blue crystal wall seems unremarkable and useless, yet it troubles this Lord Ancestor Dragon so much. I really don't know where the former ancestor got this blue crystal wall..."
The Purple Blood Dragon King looked at Ye Yun's back, thinking anxiously.
Regarding this blue crystal wall, he knew nothing about it either.
In his mind, the blue crystal wall seemed to be good for nothing besides being hard.
He usually practiced near this blue crystal wall and sometimes would curiously test it.
The Purple Blood Dragon King used various powers to test this blue crystal wall but was surprised to find that, no matter the power, he returned disappointed every time.
The blue crystal wall was exceptionally hard, and its material was unknown. Even with his formidable power, he couldn't make any mark on it.
This greatly shocked the Purple Blood Dragon King at the time.
Perhaps...
