The shadow knight's are a Large group of million's, They are mainly villain's, But reformed shadow knight's tend to take a more careful tone. They work for The devil, Who resides in hell. They do anything to get those they believe 'Worthy' on Their side.
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The shadow Knight's are Created once somebody dies, or finds themself stuck in hell. But some are created just from being in 'Hell'. If they go under a Mental change, This could happen if other shadow knight's Are convincing them that they'd been abandoned, or left to die. If they wish to achieve Abilities and powers, Immortality, They must go to the Over realm, And kill someone they once Were close to. (Lover's, King, Family, Best friends, ETC.) If they do not do this, They are called a 'Prematured Shadow Knight'. They are simple a name, and use in battle, They aren't part of the True shadow Knights. However, All Shadow Knight's are immortal as long as they Stay in hell. All Shadow knight's can turn into a Larger, And more powerful version Of themselves, Which has Armor, And weaponry. There are no method's for Curing shadow Knight's, However, Some shadow knight's are able to Keep control of themselves, Through mind over matter. They develop more humane feeling's when being in the Over-Realm for too long, Although they will remain shadow knight's for the rest of their Mostly eternal life.