The Treasure of the Knight King

Right in the heart of the mighty Petzen mountain range is the cave where King Mathias is located with his powerful army of knights, the infamous "Black Legion". Here he has sat for centuries, slumped at a large table. The ancient legend tells that he will awake when his beard has grown seven times around the table. The time is coming soon and there is very little left. Then all his warriors will also awaken and go to war. We are in the antechamber of this cave, where one of his knights keeps eternal watch and makes sure no uninvited guest finds the secret entrance and enters the cave. Somewhere in here, well hidden, are several heavy gold coins, which the knight guards carefully. He has just left the room and is on patrol through the large cave where King Mathias and his sleeping army are located. In exactly one hour, he will be back, and then guard the cave entrance again, killing any unwelcome intruder to keep the secret of the cave and its treasures safe. Since the exit door to the outside has closed behind us, we need to quickly open the door and find the key. To do this, there are many puzzles to solve, which are hidden here in the chamber of the black knight. So let us start quickly, for soon the terrible knight will return!