Three penguin couriers carry a glowing lantern across a drifting polar sea. Hop floe to floe, pass the lantern cleanly at each hand-off ring, and outrun the thaw to light the beacon.
Twelve legs across the floes, through gusts, warm water, polar night and a calving glacier. The lantern reached the lighthouse and its beam now sweeps the whole frozen sea, guiding every courier home.
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Chase gold on every leg, or race your own ghost.