Mask

The mask is one of many recurring devices in the Legend of Zelda series. Wearing a mask may alter certain actions or change the user in some way, shape, or form.

Ocarina of Time

There were only a few masks in this game, some of which needed to be traded in order to unlock the rest. This made up one of the simple side-quests found in this game.

Majora's Mask

The mask played an enormous role in Majora's Mask, with the addition of masks that allow the user to become a Deku, Goron, or Zora. There is also the Giant's mask that is sometimes considered a transformation mask.

When Link obtains all masks, he is able to make a sort of wager with the Moon Children in order to obtain the final transformation mask: Fierce Diety mask which allows the wearer to change into Fierce Diety for the duration of a boss battle.

Masks are often obtained through side-quests and are, therefore, rather useless in gameplay.