Boardgamegeek https://boardgamegeek.com/boardgame/328369/rapa-nui-clan-wars
English - Rapa Nui: Clan Wars consists of two new elements for the Rapa Nui base game: "The Sign of the Great Ancestors" introduces a new large obsidian Moaï, and seven Ahu tiles can be used to reinforce the importance of turn order while significantly lengthening the game.