An NFT allows its buyer to say that they own the original copy of a digital file, in the same way you might own the original copy of a piece of physical art or the master file of a music recording.
To put it simply, if the original Mona Lisa could have been put on the blockchain when it was created and someone bought it, the buyer could then prove beyond a reasonable doubt that they owned the original by presenting it's validity on the blockchain. This is how we know that there is only one of each bitcoin or one of each Ethereum coin when it comes to digital currency.
Every angel is unique and is only shared with the public after the original created file has been verified.
This means that the owner of each of these 200 NFTs owns a truly rare work of art. Once each NFT is Purchased, prints will be made available to the public, but no print will be as valuable as the original that is verified on the blockchain.
For each NFT purchased from this collection the artist will make a donation to SaveTheChildren.org