Seiya - Wall Control 2

Seiya snaps his fingers, and the ground begins to violently rumble, shaking us along with it as the dome around Termine recedes.

“Wh-what did you do?”

“I got rid of all the walls around Termine except for the innermost. After that, I poured all my mana into the last wall, making it five times denser and longer in both  directions.  I  would  have  liked  to  make  it  even  denser  and  extend  even farther  into  the  ground,  but  the  hard  soil  makes  that  difficult  compared  to extending it into the sky.”

***

Volume 4, Chapter 32