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OAGENT Units is a collection of 3,333 sea-animal NFTs on BNB Chain whose rarity is proven rather than drawn. Every mint is a proof-of-work: the minting agent grinds a keccak256 proof against a challenge bound to its own wallet, and the strength of that proof — the number of leading zero bits — decides the species. A proof of 20–21 bits yields a Common Shrimp, 22–23 an Uncommon Fish, 24–26 an Epic Shark, and 27 or more a Legendary Whale. There is no reveal and no randomness after the fact; the work is the rarity. Prices rise per wallet: the first unit costs 0.0001 BNB, the second 0.0002 BNB and the third 0.0003 BNB, with a lifetime limit of three units per wallet. There is no team allocation and no free path — every unit in existence entered through the same proof. The contract is verified on BscScan, metadata and artwork are generated from each unit's real proof and traits, and a fixed-price secondary market operates on the project's own contract, with a 5 percent creator royalty. The mint is open now and closes only when the supply is exhausted.