"Mermaid Lantern!"

Ma Laodao shouted out in surprise.

"In fact, it is the pinnacle of ancient chemistry, just adding phosphorus to lamp oil."

Yu Fei spread his hands, he still knew something about this matter.

Then everyone carefully walked into the door, but after everyone went in, there was really no mechanism.

"Bang..."

Suddenly, another mechanism behind him was activated, and a huge thick stone slab fell, completely sealing the door.

"Damn it, I still got tricked!"

Yu Fei slapped his forehead and said speechlessly. Seeing this, Shouhou and Sun Laizi hurriedly put out the oil lamps. Burning these things would consume oxygen, and they were trapped in the secret room at the moment.

At this time, Ma Laodao took out a candle, lit it, walked over and placed it in the corner of the tomb.

"You're crazy! There wasn't enough oxygen, yet you still lit candles!"
Chapter completed!