C2561 Entering the Ruins

"Not hard?" Mount Tai punched the stone pillar, but it did not budge. There was not even a crack. Even an immortal sword would not be able to break it.

"You said it was not hard enough. How can it be considered hard?" Tai Shan said grumpily.

"You guys be careful. I will try it." Zhu Qing smiled. He was afraid that the killing formation formed by these stone pillars was indeed very powerful