In The Legend of Zelda: Majora's Mask, the Oath to Order is a mystical ballad taught to Link when he rescues the first of the Four Giants from Woodfall Temple, during his quest to save Termina from Majora's Mask and the falling Moon. It is used to call the Four Giants, but it only works if you call them from top of the Clock Town past 12 am on the final night. Once called, the Four Giants -- If you saved all four of them -- come and hold up the Moon for the player to enter and defeat the evil inside Majora's Mask. In case you have saved less than all four, the ones who have been saved will still come, but they will not be able to stop the Moon from crashing into Clock Town on their own.
