“What final resort!?”

Yun Qinghong gazed afar, his sunken expression carried deep helplessness. “Do you people still recall the thing left behind for Demon Imperial City by the fourth generation Demon Emperor, which he used half of his entire lifetime worth of sweat and blood to build?”

“Patriarch, are you referring to… the Great City Barrier Formation?” Great Elder Yun Waitian immediately said.

Beneath Demon Imperial City was a Great City Barrier Formation ...