The Stone of Agony is an item found in The Legend of Zelda: Ocarina of Time for the Nintendo 64. The item greatly resembles a Nintendo 64 Rumble Pak made of stone, and this is intentional, for when a Rumble Pak is inserted in the Nintendo 64, and when the Stone of Agony is equipped, the controller will rumble when a secret is nearby. Coupled with the Mask of Truth and Lens of Truth, these three items will give Link access to a multitude of areas that would be nearly impossible to find otherwise.