From Zelda Legends Wiki
A very important sword, forged by the people long ago. The gods instructed the people to forge a sword to repel evil, since they knew evil ones could abuse the Triforce. The Master Sword, known also as the Blade of Evil's Bane, can only be wielded by a true hero, and holds the power to repel evil. It has been used to defeat Ganon at least five times. It has a blue hilt with a golden emblem, and the Triforce symbol is engraved onto the blade.