Opening the door to the Boss's room
The Mysterious Crystals is an item in Skyward Sword. It works as a Boss Key to open up the door leading to the Boss of the Fire Sanctuary, Ghirahim. As a large mass of glowing square crystals, it can be turned around until it matches up with the lock on the door and opens it. In order to obtain it, Link must solve a puzzle in which he needs to dig underground with the Mogma Mitts and crawl over small pads that light up bird-like statues in a specific order. After they are all lit, a gate opens and releases a Moldorm that Link needs to defeat to exit the underground passage. He can then find the Mysterious Crystals in a Treasure Chest.
- ↑ "You got the Mysterious Crystals! This mass is made up of faintly glowing square crystals. Several are missing." — In-Game Description, Skyward Sword.
- ↑ "Bring light to each statue in accordance with the number of wings each possesses, from least to most. When light resides in each statue, the king's treasure shall be yours." — Stone Tablet, Skyward Sword.