Meta Blocks, a platform founded by Sarthak Khurana, enables developers to build NFT applications and create upgradeable NFTs that decay over time. By combining a base NFT into the Solana-hosted smart contract, along with other component NFTs, users can create a meta NFT with new traits or new skins, for example, making it useful for games. Each time a user deposits or withdrawals an NFT from the smart contract, the metadata of the meta NFT is modified to reflect all the component NFTs.