At the start of a round, each player places one okus token on top of The Illimat. Once they are on the Illimat, these tokens aren't tied to a specific player; when you clear a field, you can take any okus token you wish from the Illimat.
Traditionally, an okus is an object with some personal significance to the player who puts it up, and we encourage experienced players to bring their own okus token to the Illimat. Your copy of the game comes with four metal okus tokens to get you started. They depict a bear tooth, an ancient chess pawn, a boat, and a bathtub. Regardless of who takes them during a round of play, all okus tokens are returned to their owners at the end of each round.