The Master Sword, also known as the "Blade of Evil's Bane" is Link's iconic weapon in The Legend of Zelda series. It was forged by the Ancient Sages to vanquish beings of evil who would use the Triforce to wicked ends, and can only be wielded by those who are pure of heart and strong of body.
The Master Sword is a double-edged long sword with no fuller (central blade groove), and either a purple, gold or blue hilt, depending on the game. The hilt has a noticeably large cross-guard in relation to the pommel, and interestingly, it is somewhat reminiscent to the seal of the royal family. The blade has a large ricasso (unsharpened blade portion near the hilt suitable for a second grip), although Link is never portrayed using it in any of the games. Engraved on the blade is the Triforce, and embedded in the cross-guard is what appears to be a yellow gemstone.
