"I can't remember!" said the demon king.

Lin Feng was not disappointed when he heard Yaojun's answer, because this was what he expected.

At this time, the demon king suddenly said, "But the pattern on the iron box looks a bit familiar!"

The formation pattern on the iron box was very strange, and Lin Feng didn't know its origin. Now the demon king has an impression of the formation pattern on the iron box.

Doesn't it mean that we can find some clues about the iron box?

He couldn't help but ask, "What is the extraordinary origin of these formation patterns?"

The demon king said, "This should be a kind of underworld pattern inherited from the underworld!"

"Underworld pattern? Is it related to the underworld?" Lin Feng took a deep breath.

Could it be that the iron box is something spread from the underworld?

Lin Feng couldn't help but change his color slightly when he thought of this.

The things that spread out from the underworld are definitely not trivial.

No wonder the iron box is so weird that it can even scare away the evil spirits in the Thunder City.

"Rumble...".

Suddenly at this time, the ground shook like a mountain.

Lin Feng quickly rushed out of the courtyard.

I saw that the entire huge Thunder City was shaking violently at this moment.
Chapter completed!