Deku Mask

The Deku Mask is the first mask acquired in Majora's Mask. It is one of several masks that contains the spirit of another being; in this case, a Deku Scrub. Wearing the mask will cause Link to take on the form of the Deku Scrub, and gain new abilities.



Obtaining the Mask
The Deku Mask is a mandatory mask. Link acquires this mask upon learning the Song of Healing from the Happy Mask Salesman. The song causes the Deku spirit residing in Link to be encased within a mask, which then falls as his feet. The Happy Mask Salesman then tells Link to keep the mask as a momento.

The Spirit Within the Mask
During his travels through the inner Clock Tower, Link will run across a tree bearing a resemblance to a Deku Scrub, which Tatl even points out as looking like Link. During the ending credits cutscene, the Deku Butler (who lost his son ) is seen standing near the tree, implying that the tree is his son, most likely killed by Skull Kid, who then used that spirit to transform Link.