C451 A Simple Formation?

He didn't know how much time had passed, but he heard Hou Dong exclaim in surprise and opened his eyes wide.

"What? Did you discover something?" Su Yi quickly asked.

"After my calculations, I discovered that this formation isn't that complicated. It's fine to just use the usual method to break it, but …" Hou Dong looked confused.

"But what?"

Hou Dong did not say anything. He frowned