Divine Desert Island Survival System

　　 "Ice saltpeter!"

　　 Han Xuening was shocked, "It is actually ice saltpeter, and these are all!!!"

　　 Ice saltpeter has the same effect as saltpeter on the earth. It can freeze ice in contact with water, and the powder can also be used as a gunpowder formula after special treatment.

　　On the Canglan Continent, ice saltpeter is scarce. As early as many years ago, the Caucasus barbarians used saltpeter to make ash explosives, and almost unified the Canglan Continent.

　　 Zhao Yunxiang found through experiments

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