Koh-Lanta: L'Île au Trésor

Koh-Lanta: L'Île au Trésor is the 19th season of Koh-Lanta, the French version of Survivor.

Twists

 * Tribe Selection: Right after their arrival, the castaways find a message telling them that a metallic piece is hidden close to them, and the person who finds it will have an early advantage in the game. After Jean-Luc finds the piece, he is told that he will be the leader of one of the two tribes, and he must choose who will be the leader of the opposite tribe: he names Bruno. Jean-Luc must then divide the 18 other castaways into two tribes, with Bruno ultimately deciding which tribe he and Jean-Luc will be on. After the first Reward Challenge, Jean-Luc is sent to Treasure Island.
 * Treasure Island: This is an island away from the two tribe camps. On this island is hidden a buried chest containing a "golden ring", which directly qualifies its founder to the final four. To find the chest, the castaways must first find ten markers which each contain a metallic piece pointing to the next marker. All ten pieces are required to open the chest. In the first episode, the castaway who found the metallic piece at the initial challenge is the first person to spend 24 hours on the island. During the pre-merge phase of the game, after each Reward Challenge, the person who previously went to the island must send another castaway from the winning tribe to the island. After the merge, the winner of each Reward Challenge is given the choice between enjoying the reward or going to the island. If they choose the island, they must give the reward to someone else, and if they choose the reward, they must send someone to the island. This continues until the ring is found.
 * Immunity Necklaces: The Immunity Necklaces (equivalent of Hidden Immunity Idols in Koh-Lanta) are hidden at pre-merge challenge sites, while clues are hidden at the two camps.