These factories are used to mint artilleries such as ballista, catapult etc. Players will be able to use these minted NFTs in gameplay or sell on the marketplace. There are 3 types of Artillery factories in League of Empires. The difference between them is what kinds of artilleries they can mint, how much time they need to mint and how many resources are needed by each factory to mint these artilleries. $LOE token will be needed to mint NFTs.
Players can speed up the minting processes by spending in game Diamonds (not a crypto currency).
Players can also build their own factories if they are at certain levels and have certain number & types of resources.