"The tribes were to swim out to collect bundles of planks, sticks, and ropes. They would then have ten minutes to use these items to build a blockade of the other tribe's tunnel. The tribes would then race to tear apart the other tribe's blockade of their own tunnel and get all the members of their tribe through to the other side." ~ @SurvivorWiki
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They win steaks, sausages, vegetables, condiments, and wine for reward.
They can send one player from each tribe to exile island.
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They will return before the immunity challenge.
Proceed to exile island.