Sword of the Six Sages

The Execution Sword is a sword from The Legend of Zelda: Twilight Princess. This sword is the one wielded by Ganondorf in the game and cannot be used by Link. Ganondorf carries this around in a sleeve as his cane/rod, and uses it in combat against Link during the final battle. Ganondorf also refers to it as a "foul blade", proclaiming that while he wields it, he does so in disgust, and detests how the blade was used in an attempt to kill him.

A long time prior to Zant's invasion of Hyrule, the Ancient Sages sentenced the Gerudo leader Ganondorf to death on the count of treason following Link's return from the future Imprisoning War. They used a sacred glowing blade to impale him while he was chained to a rock in the Mirror Chamber at the top of the Arbiter's Grounds (this causes the blade to sometimes be referred to as the Sword of the Sages). This execution attempt proved unsuccessful, and he emerged alive, killed the Sage of Water, and ripped the sword from his torso. The blade left only a large, glowing wound in its place.

This wound would later prove to be disastrous for Ganondorf upon his return to Hyrule, as Link realizes that the wound is his weak point, and defeats him by zeroing in on the wound in wolf form during one of the final battles against Ganondorf in his beast form. Upon Ganondorf's final defeat, the glowing wound on his chest fades away. The reason for this is unknown; it is however likely that since it is a magical wound, once he dies, it stops affecting his body.

Super Smash Bros. Brawl
Ganondorf also wields the blade in Super Smash Bros. Brawl, however he only uses it as a taunt, and not in combat.