"The tribes have to roll a large ball through a series of gates. At two points along the course, a tribe member has to climb atop the ball to retrieve two sets of keys. At the final gate, the keys unlock three chains that block the gate. The first tribe to go through all the gates and roll their boulder atop a short pedestal wins." ~ @SurvivorWiki
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They also win fishing gear.
They can send someone from the losing tribe to exile island.
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They send Marcus.
He be back for tribal council.
Proceed to exile island.