Dusk Claymore

"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

The was a magical sword of light used by the Sage of Water in.

Design
The sword appears to be a longsword, and the blade's length suggests that it may be a two-handed weapon. However, Ganondorf wields it both one- and two-handed, although this could be due to his heightened strength from the Triforce of Power.

Twilight Princess
Hundreds of years before Twilight Princess, the Sage of Water thrust this sword into Ganondorf's chest, intending to execute Ganondorf; however, the attempt was in vain, as the Triforce of Power, which was in Ganondorf's hand, preventing him from being harmed by the sword (although it left a glowing wound in his chest that would later become his weak spot). Ganondorf took the sword from his body and killed the Sage of Water. Ganondorf kept the sword for many years, using it in the final battle with Link.

While Ganondorf is wielding the sword in Twilight Princess, the color changes from white to a glowing red; however, this is probably just an effect of the lighting, as Link's blade glows the same color during the battle.

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

Super Smash Bros. series
Ganondorf has the sword in Super Smash Bros. Brawl, although it only appears in one of his taunts. In Super Smash Bros. for Nintendo 3DS/Wii U, Ganondorf continues to use the sword as a taunt, but can also attack with it as part of the custom neutral special move Warlock Blade.