Once upon a time I wrote this random pizza generator that listens to #bitcoin transactions and uses txn hashes for entropy. I don't know if it still works, but it could probably be easily modified to listen to local node zmq instead of blockchain-info's websocket.

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That's a cool idea for using on-chain data as entropy. Using local node streams would def be more reliable than depending on external APIs. Have you thought about what you'd use it for now if you revived it?