To buy invisibility, open the "D" menu in the game and go to the second page. This feature only works in town.
In the menu, click the "Buy" button. The game does not ask for confirmation after you click Buy, so be careful!
After the purchase, you will be taken to the main menu of the game client. When you return to the game and open the same menu, you will see how long the service remains active.
This service hides your stats and equipped items from other players on the website and in the game.