"Each competitor has 150 to 200 wooden tiles. They must use the tiles to build a house of cards up to certain height within a specified time period. The first person to reach the target height wins. However, if the clock runs out, the contestant with the tallest house of cards wins the challenge." ~ @SurvivorWiki
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John, Aras, and Gervase are at Redemption Island.
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Candice does not switch places with John.
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John, Aras, and Gervase compete.
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John finishes first and advances.
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Aras finishes runner up and advances.
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Gervase is eliminated from the game.
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John gives a clue to the hidden immunity idol to Katie.
Proceed to the immunity challenge.