Railcats is a unique and exclusive NFT collection comprising 7788 diverse, secretive, and well-equipped cats on the Ethereum blockchain (ERC721). Each cat NFT can evolve through a mysterious evolution mechanic, where two NFTs are burned to create a new one with rerolled shared traits and retained non-shared traits from the first parent. The collection is a community project of the renowned privacy protocol, Railgun, which enables Zero-Knowledge Privacy for on-chain dApps.