Demon Destroyer Blade

The Demon Destroyer Blade is a weapon forged by the great Devils of Hell to fight back the armies of the Demon Lords. It is potent against all Magical Creatures, though it is near instantly lethal to all Demons and Demonic Entities.

Properties

The Demon Destroyer Blade has multiple major properties, but the baseline power it has is that it deals extra damage to magical creatures. This includes magical beasts like Dragons or Unicorns, but also the more magical humanoid races like Draconians and Korvians.
That being said, there is one type of magical creature that is specifically harmed by the Demon Destroyer Blade: Demons. That is in the name, after all. Lower-ranked Demons are nearly vaporized after touching the blade, and higher-ranked Demons are harmed more than anything else.
Unlike most other Infernal Weapons, however, this also deals extra damage against Holy creatures like angels. This is considered to be strange, but is why it is seen as one of the greater Devil Weapons.
The greatest power for Devils it has, though, as that it does not work against Devils. If the wielder attempts to use it against a Devil, they will be harmed instead. Due to it being a weapon for Devils to use against Demons, it cannot be used the other way around. Therefore, Devils are perfectly safe from its power.

Wielders

After it was taken from the corpse of its creator, Innovation (See Sidebar for More Information), the blade was given to an enemy of the Gods themselves.
The Demon Destroyer Blade was kept somewhere in the Human city of Nerodil after the incident involving the group of Priests known as the Divine Heroes.

Vodron Susk by Jarhed

It is likely that more people took and wielded the blade between then (20) and the time it was found next (538). There is no clear evidence of this however, as the only time it was known, was when Stingal Rozen found it.
Stingal Rozen was a Human artifact collector who would travel all over the world to get magical items and artifacts to showcase in his home. While many like him would try to sell this or use this for some kind of monetary gain or to get fame, Stingal instead did it purely to have the artifacts in a safe place.
Nine years later, Stingal handed it off to a good friend who he was working with as a wedding gift. This man was the future Court Wizard, Vodron Susk.

Innovation by Jarhed

Innovation

Innovation was a Devil residing in Manhottan, the second layer of Hell. He was down on his luck and, thus, joined the Hell Military to protect Hell. After all, Demons were always trying to break through to Hell.
He was injured in the field of battle and was unable to continue fighting. At least, that was what many people thought. However, the truth was that he was trying to forge a weapon for himself. One that would put him on even, if not better, footing against the Demon Hordes. A sword known as the Demon Destroyer Blade, which would harm all Demons but could not hurt Devils, meaning that it would be useless for the Demon soldiers if they were to get their hands on it.
Innovation was still killed in battle, but as the Demons tried to touch his blade, they were killed. So the Devils took it, and eventually it was sold off to Totania, brought over by a Devil during a time where many heroes were present in Human Territory. A Devil brought it to a group who opposed those known as the Divine Heroes (a group of Priests and Holy Individuals), and it was used against them, much against its original intention.