EDITED/UPDATED Aug 18 2013 (Colored in Painter 12)
FIERCE DITY LINK from Majora's Mask
Its the Finale mask given to you in exchange for all of the mask you have collected When this is the only one left.
Something with giving them to those freaky kids on the moon, Then you kick there asses, Do it like 4 times till you have no mask at all, Then ask Majora to play But since you have no more mask he makes this one for you. "Not a smart more, When trying to destroy the world"
Was an Epic day in history when I finally got it, Was before Internet so I had no clue what it could been.