Like in most mobile games, Game of Khans (Great Khan) has gift codes that can be exchanged for diamonds, coins and other bonuses.
Where to enter the codes
Click on your avatar in the upper left corner of the game.
Then click on the gear icon in the lower right corner of your profile.
Click on the “Gift Code” button and enter the code to receive the award.
gameofkhans (without spaces or small letters) – free diamonds, 1 draft seal, 1,000,000 silver coins and a Talent Pendant.