Des'Noir has always been Atra's sentient shadow in which Atra controls, even his mindset. But recently Atra discovered that the original Des'Noir adapted Atra's anti-matter and became him over time. They were identical, give or take some clothing alterations. But Des'Noir is a more rational thinking Atra who doesn't mind the form that he's in as long as they have a purpose. Atra had to go kill the lead STALKER, take his soul, and infuse his body with the Nocturn to fuse Des'Noir to his body. Now Des'Noir firstly resides in Atra's bone marrow but there is always a cloud of shadow energy surrounding his feet when Atra walks because that's Des'Noir leaking out of his body constantly.
Des'Noir's "Human Form"
Des'Noir's "Weapon Form"
------------------------------
Because Des'Noir is Anti-Matter he can take the form of any weapon or any type of phenomena. Often, Atra would either keep him as the war glaives or use him as Tendrills, or Giant Spikes. Because he is also infused with the Nocturn, these are highly durable and eat whatever form of matter is applied to them give or take some restrictions. And because Des'Noir is always out of Atra they are binded in the shadow realm that means that Atra is always touching Des'Noir rendering him able to constantly use the abilities granted by him at all times.
The Resilient Soul
---------------------
As it turns out, Atra's soul Wavelength is highly resistant to insanity but will give in after too much exposure. The Resilient soul has the ability to harden itself in the form of a shield or harden inside atra to grant him the immunity to any soul based attack and to over come it unconditionally 1 time per battle, for this type of defense consumes a lot of chakra. After this, Atra can no longer form a soul resonance with Des'Noir in that battle. However, he can form sheilds with his soul wavelength they wont be as durable due to the chakra cost. His Soul takes the form of a gargoyle overshadowing him
Des'Noir's Abilities
------------------------
Shadow Flood- Atra can use his soul wavelength to rapidly expand his shadow from under him, causing it to rapidly expand a lot faster and lager than it originally could. The Soul Wavelength infused shadows take more chakra to manipulate but guard Atra's shadow from sunlight to a certain degree making it exist in the harshest or darkest conditions, the more light there is in the area the harder it is to comabt
Transmogrification- Des'Noir as previously stated can transform into ANYTHING atra comes up with, whether it be large spikes, tendrils, or even swords, or his original war glaives. These are now permanently infused with the Nocturn since it is now a property of Atra's soul wavelength. Nocturn consumes matter and soul energy giving whatever offensive form Des'Noir takes the ability to gnaw through weapons, and shields slowly but surely
The Flood- Because Atra is using the FIRST Des'Noir ever created he can summon more of the past looking Des'Noir, his soul wavelength allows him to control two at a time in which he is unable to attack. These Des'Noir are able to use whatever abilities Atra has at his disposal
Shadow Posession 2.0- Atra has obtained a new form of shadow posession, he can posses an individuals chakra network or soul wavelength rendering them unable to use any energy consuming techniques whatsoever for a given time period. Should an individual be in the range of Atra's soul wavelength he can fuel his soul into their shadow and infect them using their shadow as a segue, this process is invisible but is a lot less affective from far away
The Shadow Realm- Atra can segment a portion of the space off and align it with the Shadow Realm, giving him the ability to send volleys of shadow based attacks out of nowhere even if there is no shadows around to do so. For Example, Atra can tie in the area within a 50 foot radius from himself to the shadow realm allowing him to summon torrents of shadow water in that are without expanding his shadow
Shadow Menance- Atra's custom made version of Soul Menance, causing HEAVY internal damage to the foe by sending Atra's nocturn infected soul wavelength into the foes shadow, the wavelength would devour their insides leaving them to be nothing more than a shell
Shadow Lending- In any case Atra is fighting a foe that does not have a shadow, as long as they are in the range of his soul wavelength, he can give them one... but this only stays connected to the foe for 3 minutes before it goes away and can never be done again for the rest of the battle and technically he is connecting wavelengths with the person the well skilled individual can sever these ties easily
Shadow Chain Resonance- By soul possessing an Ally Atra can easily obtain chain resonance with them, these are most usually done with his Des'Noir clones