Clarent

Clarent also known by the nickname "The Coward Blade" formerly known as "The Sword of Peace" is a former holy sword that is the complete opposite of the Excalibur blade. Due to having lost it's status as a holy sword it became a weak and dull magical blade until the spirit of hatred and anger from both King Arthur and Mordred manifested and became a demon, thus the sword becoming a powerful demon cursed blade.

After learning that it was the sword his mother, Camilla Pendragon, possessed and being given the sword by the Demonic Council in Life 4, Ichiro Alastor sees the sword as his greatest possession even going as far as to get angry when Kiba or Meguri tries to fight with it.

The sword's main power is in the dangerous curses it's able to inflict on the wielder's enemies but these curses can also backfire on the user, shown when the Goblin King reveals that Ichiro's mother was under the murderous rage curse for a while until Seth Alastor was able to break the curse with love.

Summary
Being the sword that Mordred the traitorous knight used to kill King Arthur during the Battle of Camlann, it became seen as a "defective blade" after losing it's holy abilities and ability to cause blessings, because of this, the sword was thrown out by the Pendragon Family who turned it over to the Mordred bloodline before throwing them out of the Pendragon Family.

Unknown to the Pendragon family however, a demon began to be born from the hatred and anger feelings that both King Arthur and Mordred harbored before their deaths. This demon then began to become a curse onto the blade giving it the strength and power it currently possesses. It is unknown how this was even possible with a exorcist from the church saying it's disgusting how such a once holy blade can become so twisted and evil. Despite the curse of the blade, the sword was passed along the Mordred family for generations and at the age of nine, it was given to Camilla Pendragon during the Civil War in the underworld

where she began to succumb to the blade's curse, being filled with a murderous rage that made her want to kill. After killing one of the descendants of the Original Leviathan, Seth Alastor found her being possessed by the blade and was able to calm her down, after marrying her she officially broke the curse, thus the murderous rage was lifted.

Appearance
Despite becoming a cursed demon blade, Clarent still has the appearance of a holy sword, appearing as a two handed Great Sword with gold and blue lining going down the silver blade and a blue gem at the bottom. The sword also has a rather large blue handle, with the handle being almost eight inches long.

Demon: Jezebel
The demon takes on the appearance of a female named Jezebel with long orange-red hair, red eyes, wearing a black dress with red outline. She is very tall, easily a foot taller than Ichiro and has black horns on her head. She delights in drinking Ichiro's blood and gets excited when he feeds it to her saying it's the equivalent to human's chocolate, despite this she is shown to be aggressive and nasty due to her main goal being to turn Ichiro into a demon when he first uses the blade in combat that night she begins giving him nightmares in order to make him tired in the day so he will be weaker and more submissive to her attempts to demonify him and then during the day she gives him sexual dreams in order to torture him. Because of this, Ichiro says he will never be able to trust her, this is another reason why he doesn't want Kiba or Meguri to wield the sword because then they would be forced to bear this curse with him. It is revealed that she was the one who gave his mother the murderous rage curse and would've turned her into a demon if Seth Alastor hadn't broken the curse. She states that she doesn't care about the three main factions and only cares about possessing Ichiro due to her obsession with him.

Powers and Abilities
Due to losing it's status as a holy sword, the blade carries none of the holy powers that were once sealed inside the

blade, the blade also lost it's power to give and use blessings. Instead, now since the blade is possessed by a demon, it is capable of only giving curses.

Curse (呪い) is the strongest ability within the sword. The wielder is capable of inflicting a wide range of curses on the enemy by reciting spells however these curses also have a negative impact on the person who uses them thus making the curse ability a double edged sword. It is revealed that Camilla Pendragon knew a wide range of different curses and knew how to even ward off the curses. So far, Ichiro only knows one curse. Corruption: The more the wielder fights with the sword, the stronger they will become and the more people they kill their memories will be sealed inside the sword increasing their power however doing this will damage the wielder mentally and eventually these mental symptoms will manifest physically Hatred and Anger: Due to the hatred and anger of Mordred and King Arthur being sealed in the blade, the sword is capable of covering itself in a thick black aura of energy that is capable of cutting or even impaling opponents. When using this aura, the wielder will hear voices of hatred and anger from the blade.
 * 58b6fd80284684cf78aac8f988209921fea962b2 hq.jpgA-Ra: A curse that causes the opponent's head to be filled with thoughts of being killed by Ichiro even causing the fallen angel Kalawarner to vomit during their fight however ironically this curse causes Ichiro to lose his ability to wield a sword.

Drawback
The major drawback of the sword is that the demon inside the sword is trying to possess the wielder. The secondary drawback is that all the abilities of the sword can make the wielder go mentally insane or can even possess their body.

Trivia

 * I chose the name Jezebel because in the bible, Jezebel convinced her husband King Ahab to abandon the worship of Yahweh and encourage worship of the deities Baal and Asherah instead and even persecuting or killing those who worshiped the Christian God. So I thought this would be perfect for a demon whose main goal is to turn it's wielder into a demon.
 * The image used for the Clarent Sword is from the

Chrome Shelled Regi series. os
 * Images used for the powers and abilities are based off of Yuichiro and Guren from Owari no Seraph.