At last, Sean Knight reached the bottom, discovering at the foot of the stairs a flat space where a door stood on both the left and right.
Both stone doors were tightly shut, but this did not pose a problem for Sean Knight.
Behind the left stone door were jars of black liquid, and it was unclear whether the level had dropped slightly due to the door's seal or because the liquid itself was not prone to evaporation.
One could tell at a glance that there was something wrong with this liquid. Sean Knight carefully examined it and immediately found that, apart from being sealed by something, the bottom and sides of the stone door were also coated with a large amount of white phosphorus!
If anyone tried to forcibly open the door and it rubbed against something, it would instantly ignite!
Needless to say, that liquid was definitely flammable. The designers were truly ruthless!
Then he turned to the right stone door and found that it was filled with sand!
All the way up to the top!
