Tournaments in the game are held to reward the fastest and most persistent players.

When a tournament is active, its icon will appear in the game. You will only need to spend some energy  or banknotes  to start competing against other players in your group. Groups are divided randomly into players with similar play styles.

By spending energy and banknotes each time, you get some ancient coins . The more ancient coins you collect, the higher your ranking in the tournament will be. Collecting enough coins will also give you additional rewards .

Good luck!