What blockchain is the Great Expectations collection on?

Great Expectations is minted on the Palm blockchain, a new & more energy efficient token-powered ecosystem for NFTs connected to Ethereum. The HENI Marketplace is on Palm and can be found here

You are able to use your Great Expectations NFT on Ethereum by using Palm's two-way bridge to Ethereum, which can be found here

NFTs that have been moved across Palm's two-way bridge to Ethereum can be found on our verified OpenSea collection here