Bakusaiga

Name: Bakusaiga (爆砕牙, "Explosive Crushing Fang")
Appearance:
Backstory:

Quote :

Bakusaiga is a sword that was created from Sesshōmaru's own body. The Bakusaiga came from Sesshōmaru's body attached to his finally regenerated arm. It is Sesshōmaru's final signature sword.
After shattering the Tōkijin in combat with Mōryōmaru[1] and passing Tenseiga's only offensive technique Meidō Zangetsuha to Inuyasha's Tessaiga[2] Sesshōmaru is left without a fighting weapon beyond his own native abilities. While very few demons stand a realistic chance against an unarmed Sesshōmaru, the growing darkness in the Shikon no Tama allows a demon called Magatsuhi to escape from the jewel itself. Freed, Magatsuhi assembles a body from parts of Naraku and seeks out Sesshōmaru in order to steal the last shard of the jewel from Kohaku, who is traveling with Sesshōmaru. Sesshōmaru accepts the challenge of battle and discovers that Magatsuhi has a poison that can physically damage him. The fight is interrupted by the arrival of Inuyasha, who comes to his aid. Sesshōmaru, angered by the implication of weakness inherent in the help and pity he receives from both his own followers and Inuyasha's group, manifests a powerful regenerative ability composed of demonic power, caused by his pure fighting spirit, to force his wounds closed. The battle is again joined, and the use of Tenseiga against the otherworldly spirit of Magatsuhi offers hope of victory, but Sesshōmaru is stabbed straight through his armor and chest by Magatsuhi. While he is engulfed by a mass of demonic flesh controlled by Magatsuhi, Inuyasha makes a desperate attempt to free him but only gets caught in the engulfing mass himself.
At this point, all parties are shocked to see the demonic mass blown apart by a massive burst of demonic power. The light is so blinding it takes several seconds for the group to see that the light, is in fact, coming from Sesshōmaru's severed arm. Sesshōmaru, angry, drives back Magatsuhi's probes. At this moment the sword smith Tōtōsai appears. Sesshōmaru, seeing him and realizing in that instant what is happening, meets a massive thrust by Magatsuhi with an even more powerful wave of light - in that instant, within the light his arm regenerates and along with it a sword appears in the new hand. Bakusaiga was formed from Sesshōmaru's previous left arm that Inuyasha cut off with his sword.[3]
Magatsuhi attempts to reassemble his body. However, he discovers that pieces of his body attacked by the new sword not only get destroyed, but also transmit the blow they have received to undamaged parts - his body is destroyed attempting to reform.
In the course of the final stages of the battle Tōtōsai reveals that the new sword is called Bakusaiga. It is not an heirloom or crafted sword but is created from Sesshōmaru's own body as a manifestation of his own demonic power, and thus truly his own. His success in abandoning his interest  in stealing Tessaiga as a quick path to power resulted in the development of his own inner strength, in the end surpassing even that of his father and the two swords derived from him.
Sesshōmaru uses Bakusaiga for the rest of the series to battle both Naraku and Magatsuhi. During the Final Battle against Naraku, the Bakusaiga destroys most of Naraku's body. In the final chapter, set three years after Naraku's defeat, the Bakusaiga is still carried by Sesshōmaru. It is also noted that Sesshōmaru could have obliterated both Inuyasha and Naraku at various times with the Bakusaiga, but chose not to do so. He began to understand that he could not use such power recklessly, and acted swiftly to save  Kagome as well as Rin (as this was why Naraku kidnapped Rin so that if he used Bakusaiga to destroy his body, Bakusaiga's power would have most likely killed her as well).

Now after Years of being lost, a Peddeler is offering it

Health: A
Sharpness: S
Special Abilities:
Decomposition:

Spoiler:

(In other words, It negates Regen of any kind, this is a Passive ability on the blade itself)

Yōki Wave:

Spoiler:

(Distance of 50 meters, Speed and power is at Chakra stat of Wielder, its a 20 meter long slash, 5 meter's wide/high Depending on which way it is swung, Cooldown is 3 posts, duration is 1 post)
http://inuyasha.wikia.com/wiki/Bakusaiga
For Mods to know where the descriptions came from, and to help Balance this sword


Price: Event
Character Specific: -
Bonus Requirements: This Weapon Must be won from Sesshomaru

Decomposition doesn't seem to have a resist stat. So it's almost a one-hitter quitter... that doesn't seem quite right.
Size of Youki wave blasts?

Edited, and The sword isn't nessisarly a one hitter quitter, it negates passive regen's Ie Kurama or Creation Rebirth, but does not negate being able to be healed from another source, IE mystical palm, will clearify in description if needed, Also does not negate Rebirthing

Youki wave needs cooldown.

Edited

Seems legit, approved unless another mod sees something