Don Gero's Mask

"That's Don Gero's Mask, isn't it? That mask has a very operatic feel about it."

- Happy Mask Salesman

Don Gero's Mask is obtained by Link in The Legend of Zelda: Majora's Mask that looks like a frog face and is used to talk to frogs. These frogs form a choir of sorts, much like in Ocarina of Time. By reuniting all five members of the choir, Link can get a Piece of Heart.