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. Leaving a glowing wound on his chest instead, Ganondorf took the sword and killed the Sage. Ganondorf kept the sword and used it later in the game in the final battle with Link. The sword's shape seems to boast a type of long sword, though it's size suggests that it is more of a katana like blade instead.

It is suspected that in Twilight Princess, Ganondorf continues to carry the Sword of the Sages because he wants the Sages; who attempted to execute him, to see what they have caused with their own blade.

"An impressive-looking blade... But nothing more. Would you hear my desire? To take this foul blade...and use it to blot out the light forever!"

- Ganondorf (implying that he does not particularly like the sword he is using.)