Shake Shack has a secret menu for Game of Thrones fans

But you better brush up on your Valyrian first

The eighth and final season of Game of Throne is just days away, and Shake Shack is celebrating with a special offer for super fans. For a limited time, customers visiting the company’s Madison Square Park location will be able to order from a “secret” menu.

According to Delish, Shake Shack will briefly serve a new burger called the Dracarys Burger as well as a shake called the Dragonglass Shake. The $6.80 shake is “made with minted white chocolate custard, topped with ‘shards of Dragonglass’.” The $11 burger is “a double Monterey Jack cheeseburger topped with bacon and fiery ShackSauce.”

But before you go make a fool of yourself, you might want to brush up on your language skills. Delish says you’ll have to place your order in Valyrian, not English.