Sadeas

Sadeas is a being born from the Shadowlands, a nearly barren expanse of darkness deep within Purgatory.

Personality
Sadeas is a very alien being to those who have spoken much with him. Living in darkness, rarely interacting with others, and constant struggle for survival has not left him with the most positive of dispositions. He carries out his missions with ruthless efficiency, doing whatever tasks the Legion asks of him in exchange for his continued freedom, regardless of how morally questionable some may see his actions. Any free time Sadeas has is spent searching for information on his unknown target, and his thoughts are constantly consumed with seeing his quarry brought to death.

Powers and Abilities

 * Monster Level Physicals

Tenebris Physiology
As a being born from the shadowlands, Sadeas could not be considered human in any way, despite his appearance. The consequences of his physiology are the source of all of Sadeas' abilities.
 * Shifting Form: Whenever Sadeas enters a shadowy or dark area, he is able to freely change his physical appearance. The darker the environment, the more extensive the changes he can make. Conversely, in any kind of well lit environment, Sadeas physical form is essentially locked, leaving him unable to change it.
 * Shadow Reading: Sadeas' home is the Shadowlands, a realm completely devoid of light. As a result he possesses sensory abilities suited to the pitch black space. He is able to detect life forces across great distances, and all of his non-visual senses are beyond superhuman.
 * Consuming Shadows: The space around Sadeas is always just a bit darker than the rest of the environment, this is due to the fact that he requires a steady intake of light as a form of sustenance. He is able to amplify this effect should the need arise, further darkening the area around himself, absorbing not only light but any energy source his aura can reach, draining it to reinvigorate himself or increase his strength. He is able to increase or decrease the area his shadow extends to in order to speed or slow the rate of the absorption. By pushing this ability to it's limit, or absorbing energy from a particularly potent source, Sadeas is able to amplify his capabilities considerably for a short time.

Knull
Knull is a sword with a pitch black blade carried in a beautiful silver sheathe. Should the clasps on the sheath be undone, dark smoke and tendrils will begin to form and flow out of the sheath. Knull is sentient, able to communicate freely with Sadeas, or anyone who touches it's handle. It's personality is very simplistic and jovial, as it has little knowledge besides it's desire to slay evil. "Evil" is Knull's eyes is quite arbitrary and rather simplistic, having a very black and white view of good and evil that might be held by a child.
 * Allure of Darkness: Knull is supernaturally tempting to those it deems as evil. These people feel an incredibly powerful compulsion to steal the sword and unsheathe it. Those who are pure hearted are repulsed by the sword, and touching it makes them feel sick. Knull often offers to "test" whether or not people are evil simply by having Sadeas throw it into a room.
 * "Let's slay some evil!": Whenever Knull's blade is even slightly unsheathed, it's power begins to be released. When wielded by Sadeas in this way, the black tendrils will wind up his arms and across his body, greatly increasing his physical capabilities. When wielded by one it deems "evil" in this state, the tendrils will spread throughout their body allowing Knull to take direct control of them. Beings too strong to be compelled by Knull will instead find the tendrils rapidly draining their life force, and any other energy it can reach to feed itself.
 * Vantablack: Sadeas does not fully unsheathe Knull lightly, and would prefer to never to do at all. When fully unsheathed, Knull produces an aura similar to Sadeas' consuming shadows, but many times more potent, and will quickly turn it's hunger to Sadeas himself should there not be enough outside sources for Knull to consume. While fully unsheathed, minor sources of energy such as ambient light are consumed so quickly that the an ever increasing area around Knull will be rendered completely devoid of light.