Furthermore, for Knight NFTs put in Farming vaults, we shall use the "Polish Mechanismβ. After depositing Knight NFTs in those vaults, users must check their Knights on a regular basis through the Farming site, which is considered a polishing action. If users never check their Knights, the Glossiness of their Knights will deteriorate, and the Farming rewards will drop. So, to maintain the rewards from Knight NFTs, NFT owners must perform "polishing" action, which means check their NFTs in the vaults regularly.