Opening a barred doorway in the Shrine of Illusion
The Black Orb is a Treasure found in the Shrine of Illusion. The Orb appears in a room with a checkerboard wall pattern after Zelda defeats the four Patras guarding the room. The Orb can be placed into a pedestal in the middle of a room with a colorful floor pattern also guarded by four Patras. Upon placing the Orb, the bars blocking the doorway to the right will vanish, allowing Zelda to advance further into the Shrine.