Legend of the Sword

You have been summoned to a secret meeting at the foot of the highest mountain, atop which sits a massive fortress known as the Black Castle. During the conversations, it turned out that the ancient sword - Excalibur, which changes the fate of the kingdom and yours, is located in this fortress. It is also known that a hostile intelligence service from another country has set out to get the sword. Your task is to obtain Excalibur before the enemy! However, the path to it is not easy - the castle gate is buried and the sword itself has been enchanted for centuries with powerful magic. However, you possess knowledge of a secret path to the castle - will you use it to save the kingdom?