Goron Mask

The Goron Mask is a mask featured in Ocarina of Time and more prominently in Majora's Mask. It resembles the face of an average Goron.

Ocarina of Time
In Ocarina of Time, the Goron Mask was simply for amusement; it had absolutely no function other than to see people's reactions to it. It can be borrowed from the The Happy Mask Shop after completing the Mask Trading Sidequest.

Majora's Mask
The version of the mask in Majora's Mask was much more powerful, in that it transformed Link into a Goron.

Obtaining the Mask
In Snowhead, the ghost of the Goron warrior Darmani wishes to have his sorrows healed and to be allowed to rest. If the Song of Healing is played for him, he will be healed, and his soul will be encased in the Goron Mask.