Stone Mask

The Stone Mask is one of the most valuable masks in Majora's Mask.

Location
To receive this mask, Link must use the Lens of Truth to find the invisible soldier Shiro in Ikana Canyon. After relating his story of woe, he will ask that Link give him something to cure him. To do this, Link must purchase a Red Potion and present it to him. Once Link has done this, he will hand over the Stone Mask in return.

Uses
The mask causes the wearer to become "plain as a stone", allowing Link to walk through most of Termina undetected. This is especially useful inside the Pirates' Fortress, where Link will be thrown out if caught. While wearing it, Link generally doesn't need to worry about being attacked. However, it does not fool bosses or minibosses, as well as several other enemies.

Enemies not Fooled by the Mask

 * Garo Ninjas
 * Iron Knuckles
 * Redeads
 * Gibdos
 * Elite Gerudo Pirates
 * Lizalfos
 * Dinolfos
 * Stalchildren
 * Skullfish
 * Desbreko
 * Deku Babas
 * Bio Deku Babas
 * Wolfos
 * White Wolfos
 * Like Likes

Trivia

 * Shiro will only accept a Red Potion from Link. He will not accept Milk or Blue Potions, even though both have healing properties.
 * The Happy Mask Salesman can always see Link, with or without the mask.