C2820 The Cinnamon Monster

The cinnamon in reality is a flavorful of cooking seasoning, in the game, cinnamon contains a type of mineral, which, after 10 hours of fusion, can produce a layer of corrosive substance on the surface of the iron ingot. With this kind of corrosive substance, the battleship's lifespan in the sea could be extended by three times.

Cinnamon was not a plant in the game, but a rock