Demon Arms

Driven by his desire for power, Hiroki Shiranui founded the Imperial Demons Arms with the aid of his brother Tazuna Uzumaki. The idea of sealing demons into weapons for the purpose of gaining their power was merely a fleeting thought in the confines of the KazeKage’s mind, but after encountering a member of the Akuma Clan and witnessing their tenfold or more increase in power from the demonic blood coursing through their veins, he found himself in awe of their power. After said encounter, Hiroki began numerous experiments to replicate the Akuma's power, eventually creating the Demon Arms System.
The Demon Arms are a special class of weapons or objects, which serve as both a prison and home for the demons sealed within them. Users of these weapons or objects are granted significant boosts in strength and a wide range of abilities. These are usually gained in exchange for something; whether that is a portion of the user’s lifeforce, possession of their body or simply earning the demon’s respect, all Demon Arms feed off their user’s negative emotions and some may even attempt to plunge their user into despair, for their own benefit.
An Arms’ resident demon usually grants its power to the wielder in small increments, though in some cases the wielder can bypass any requirements and tap into the Arms’ full potential. Doing so usually results in death if one is lucky, but it can also leave the wielder severely crippled for the rest of their life. An Arms power is receiving in the following stages:
* Base Stage - When someone first receives an Arms, they automatically unlock a portion of the demon’s power. Though minor compared to the progressive stages ahead of it, an Arms’ base stage has the potential to dramatically increase its wielder’s strength. Stat increases from this stage are permanent.
* First Stage - After some time the wielder will learn to better control and adjust to the demon’s power, allowing for them to progress to this stage. Their prior abilities and boosts in strength are further improved upon, while new abilities may become unlocked. At this point the user has started to grasp some sense of understanding for their demonic partner and it may even reveal itself before them.
* Second Stage - Wielder’s who manage to reach the second stage without completely succumbing to the demon's influence are granted access to an even greater amount of the demon’s power. Once again, their prior abilities become stronger, while new ones are also likely to develop. Reaching the second stage is considered an incredible feat, as most are easily overwhelmed by the demon’s power from the first stage. An Arms’ user becomes more aware of their demon as it begins to appear to them more often, often tempting them to drown in its power and surrender control.
* Third Stage - The third stage is usually acquired through giving into the demon’s temptation and losing control. Though the power granted by this stage overshadows those prior to it, the wielder’s body begins to break down and eventually leads to their death. Progressing to this stage naturally is possible but very few will ever reach it, as even attempting to access this drastic increase in power can cause death.
* Fourth Stage - The fourth stage can only be accessed by an Arms’ wielder who has progressed to the third stage and has come to find some common ground with their demon. Only through this mutual relationship with the entity can one reach such heights. 
== Object Class Arms ==
* Hana - The demon of flowers Hana is a passive and docile entity, whose existence contrasts that of her fellow demons. Straying from conflict, she hides from other beings, only emerging around her own kin. Her appearance is that of a frail woman, her form adorned with a thin green fabric and a crown of flowers nestled upon her head. She is sealed with an emerald ring.
* Agi - Agi is among the wide variety of demons capable of changing their form. The demon is a deceptive and cunning entity, always looking for new ways of exploiting his victims. Though he appears as a human during most encounters, some features of his true form remain present as a reminder of the monster he actually is. When not playing the part of a wolf in sheep’s clothing, Agi is a 9ft tall, grey skinned monstrosity. His eyes radiate a shade of crimson and jagged blood-stained teeth can be seen protruding outwards as he speaks. Agi embodies the hunt and is known for relentlessly pursuing his prey. The demon is sealed within an Oni Mask, its ominous aura constantly wafting outwards and coating the object.
* Mizunoke- Bound to a watery prison where it has endured an eternity of solitude, Mizunoke wishes for nothing more than to drag some unsuspecting soul down into the depths with her. The demon is sealed within a gem, usually burrowing itself into the body of those in contact with it, preferably their forehead, but the gem can locate itself elsewhere.
== Weapon Class Arms ==
* Nasake - Embodying mercy, Nasake avoids conflict when possible, opting to find peaceful resolutions, but when provoked he is more than willingly to forgo this and violently lash out at all those around him. He takes a human appearance, seeming to be a harmless young man at first glance. The demon is sealed within a Naginata
* Kintaro - Kintaro does not represent a specific concept like his fellow demons, but this is made up for by his ridiculously immense strength. The demon appears as a lively and carefree child, often seen playing or causing trouble, but one should not be fooled by his innocent appearance. Kintaro not only assumes the appearance of a child, but his characteristics are exactly what one would expect from a child. He treats everything as a game, never once considering the consequences of his actions. Kinatro is sealed within a katana.
* Mizuki - The demon of lust and temptation Mizuki assumes the appearance of a deathly pale woman, with piercing blue eyes and eye-catching features. Straight pitch-black hair flows down the entire length of her body, while some of it falls over her shoulders and down either side of her torso. Representing lust and temptation, Mizuki uses one's desires against them to either drown them in despair or lull them into a state of obsessive captivation with her. The demon’s only desire is to cause suffering, even to those she has bonded with. She is sealed within a katana.
* Requiem - One of Khazdan's fragments that had been sealed within the being's own weapon. Despite being a mere portion of its full strength, the fragment still possesses frightening power, proving to be very versatile.
*Kodama - During Kaguya's time on Earth, the Otsutsuki princess didn't just feed humans to the Divine Tree she had grown and the Zetsu army she hoped to build. A creature from the nether realms was bound and sacrificed to a cutting from the Divine Tree. Though this creature's body perished as did most who were given to the Tree as tribute, the thing's essence did not fade so easily. Possessing the tree, its soul was trapped within the trunk. There it would remain until an ancient priest fell away from the sect he belonged to and travelled to the tree, now known as Kodama, to fashion a pair of gauntlets from this creature. The right is a white of bleached bone, made from the creature's remains, while the left hand is a thin band of wood where the being's mind was sealed. 
== Armor Class Arms ==
* Crimson Scales - Originally part of a single entity, the demon proved to be too powerful to be sealed within any normal object and as such it has been split into several pieces, each of which were sealed within a different object. The demon in question was said to have already been split into several fragments beforehand, hinting at the incredible power it possessed even in its weakened state. The Crimson Scales is one such portion of the demon’s power. Sealed within a small glass orb, it can morph into a suit of armor within the blink of an eye. The armor was said to be the same that the demon used prior to its split. Even though it has been separated from its owner, the Crimson Scales still has a link with its owner.
== Forbidden Arms ==
*Khazdan - The Dragon Demon of Chaos Khazdan, was too powerful to be sealed within an object. The demon had to be separated into three fragments, with one of them being seal into a suit of armor and the other into a weapon. With one fragment remaining, the initial problem arose once more. It couldn't be sealed, but the process of splitting it into smaller portions was too difficult to do continuously. Instead, the last fragment of it was confined within a fortified stronghold, several hundred meters beneath the planet's surface.
== Legacy Items ==
=== Weapons ===
* Indra's Saber