Grimes Shares Unreleased Music Through Crypto Art Auction The Canadian has turned to blockchain to share her 'WarNymph Collection Vol. 1' Yesterday (February 28), the Canadian launched the first volume of her WarNymph Collectionwith 10 digital art pieces — in the form of non-fungible tokens (NFT) — that were created alongside brother and collaborator Mac Boucher. An NFT is a unique cryptocurrency token that can be used to verify authenticity and ownership within a blockchain network. Select pieces of the WarNymph Collection, arriving through NFT marketplace Nifty Gateway, come accompanied by exclusive audio. The NFT titled "Earth" features the unreleased "Ærythe," while "Mars" is soundtracked by "Mars Theme."