C388 Big Compass

"These are saltpeter. If you add sulfur and charcoal, it can cause an explosion and create a very powerful bomb." Lu Cai said.

"Like the Light Origin Bombs?" Wang Baoyu's interest was piqued.

Lu Cai shrugged, waved his hand and said, "It can't be compared. This is just the most primitive bomb, and the original shell is the product of the highest technology