Kronos' Scythe

Kronos' Scythe is a powerful scythe, and Kronos' weapon. It was given to Kronos by Gaea to slice his father, Ouranus into pieces and become king. His own children, Zeus, Poseidon, and Hades used it to chop Kronos into pieces and send him to Tartarus. It was originally wielded by Luke as a sword known as Backbiter, a sword made of steel and Celestial Bronze. It's described in myth as either a flint blade or diamond.

History
Kronos's scythe was given to the original Perseus by Athena and Hermes, along with the Helm of Darkness to kill Medusa, they claimed that the scythe was the only thing sharp enough to decapitate the Gorgon. Persues succsesfully performs his quest and returns the scythe to the gods, along with the Helm of Darkness. It is unknown how Luke got hold of the scythe in the lightning thief

The Lightning Thief
Luke was first seen, using it in the Sword Fighting Arena. Luke used the sword to rip a portal and vanish.

The Sea of Monsters
Luke used the sword again on the Princess Andromeda to fight Percy, which wounded him. Percy said that his leg felt like it was on fire.

The Titan's Curse
Luke used the sword to fight Thalia.

The Battle of the Labyrinth
Luke did not have his sword, as it was being reforged back into a scythe by the Telekhines that work for Kronos.

The Last Olympian
Kronos is seen using his scythe many times throughout the book. In his final fight with Percy, Kronos turns his scythe back into Backbiter because Percy challenged him to a sword fight. During the battle the sword is knocked into Hestia's hearth, but when Kronos tries to retrieve it, she superheats it so he cannot touch it. With the destruction of Kronos, it's reduced to a pool of molten metal. It is unknown if Hestia did this or if it was destroyed when Kronos was defeated.

Abilities
Kronos' Scythe is an extremely powerful weapon. One hit can release lots of energy into a person, severing their soul from their body. Because of its blade, which is made of half steel and half celestial bronze, it can harm both mortals and immortals. It can also be turned back into its sword form, Backbiter.

Owners

 * Luke (In The Lightning Thief, The Sea of Monsters, The Titans Curse, The Battle of The Labyrinth, The Last Olympian) - as Backbiter
 * Kronos (In The Battle of The Labyrinth and The Last Olympian) - as a scythe. (Real Form)

Trivia

 * Because Kronos was the Lord of Time and Reaper of Souls, the mythical beings: Father Time and the Grim Reaper carry a Scythe.
 * In some myths it is a sickle instead of a scythe.