Have the origins of the Master Sword ever been explained?
As far as I know, every Legend of Zelda game features the same Master Sword, passed down through the generations. However, even in Skyward Sword, the Master Sword already exists (you have to power it up, but the sword is already there).
Was it forged? Did it just pop into existance when one of the godesses created it? What are the origins of the Master Sword?