Plant an oyster. Its pearl grows every hour. Open it whenever you like, but so can anyone else.
Plant. An empty spot takes your oyster for a little ETH. 80% goes into the pot, 20% buys $REEF and burns it.
Grow. Every hour the pearl is worth 0.1% more of the pot, up to 15%. Next to someone else's oyster it grows half as fast again.
Open. Anyone can open any oyster for the same price, and the pearl goes to whoever opens it. Waiting is a bet that nobody beats you to it.
Twenty-one days of planting. Opening never closes.