X3D is a fully onchain game built as a Uniswap V4 hook. Swap fees fund a growing ETH pot and holder dividends in both ETH and X3D tokens. Players buy keys to compete for the jackpot, and the last key buyer when the timer expires wins. Each key purchase extends the countdown, creating escalating tension. Token holders earn passive dividends weighted by their balance and keys held. The token has a fixed supply of 10M with no mint or burn. All game logic lives entirely in the hook with no off-chain dependencies.