TLDR

What is this all about?

In 2015, Ethereum's first year, people deployed 6,187 contracts. Each one is a card here. To mint a card, you redo the proof of work of the Ethereum block that contract was deployed in: the same puzzle, at the same difficulty, on your own computer. Nothing is for sale. Every card costs everyone the same work, and whoever finishes it first gets it.

There was no premine and there is no team allocation: not a single card was set aside for me or for anyone else. Once the contract is deployed, its owner (the address that deployed it, until ownership is handed on) cannot mint, take or change anyone's card or its level, pause anything, or change the rules. It can send back ETH or tokens that someone sends to the contract address by mistake, and it can change how the cards are drawn, which is the next part.

The art may change

I'm just a guy who loves the tech. Art isn't my strongest area. If ETH2015 gets popular and a real artist wants to collaborate, the artwork may change. The contract is built for that: the drawing is done by a separate renderer contract, and the owner can point the NFT at a new one. Your card, its level, its golden finish and who owns it stay in the same NFT contract and do not change. Only the picture does, and marketplaces are told to refresh. The switch can also be locked for good, and once it is, the art is final.

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