"Ice saltpeter!"

Han Xuening was shocked, "It's actually ice saltpeter, and these are!!"

Ice saltpeter has the same effect as saltpeter on the earth, it can condense ice when exposed to water, and the powder can also be used as a formula for gunpowder after special treatment.

In the Canglan Continent, the amount of ice saltpeter is scarce, and as early as many years ago, the Caucasian barbarians used saltpeter to make ash explosives, almost unifying the Canglan Continent.

Zhao Yunxiang found it after testing

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