Chapter 238 Threat!

Zhou Yu's eyes instantly turned icy.

He didn't attack the stone door again, but instead placed his palm on the ground and then closed his eyes.

Before long, Zhou Yu's eyes violently snapped open.

"It's a formation!"

Zhou Yu extended two fingers, and as a terrifying surge of Nether Fire True Qi flowed, he pointed at the ground beneath him.

"Bursting Flame Finger!"

Boom!

A faint trembling sound came.

However, it soon returned to calm.

Zhou Yu frowned.

He hadn't expected that even the most powerful Bursting Flame Finger he could currently muster was unable to destroy the formation beneath the ground.

Nevertheless, he could sense that if the power was just a bit stronger, he would be able to break through the underground formation.

His Nether Fire True Qi was now only at the quasi-complete level, but as long as he could reach the complete level, the power of Bursting Flame Finger could be taken to a higher level.