Dusk Claymore

The sword of the sages was a magical sword of light used by the Sage of Water in The Legend of Zelda: Twilight Princess. The sword was thrust into Ganondorf's chest in hopes of executing him. This was not the case as Ganondorf survived thanks to his Triforce of Power, and he took the sword and killed the Sage. Ganondorf kept the sword and used it later in the game in the final battle with Link.