Song of Time

In Ocarina of Time, the Song of Time can be used in the Temple of Time to unlock the passage to the Master Sword once you have the three Spiritual Stones. It can also be used to get rid of certain blocks. In Majora's Mask, the Song of Time warps you back to the dawn of the first day. Any items or unbanked rupees you have when playing the song will be lost. However masks, upgraded weapons (except razor sword) and dungeon map and compasses will be kept.