D. Gray-Man

          A few hundred years before the main story, an artifact known as "The Cube" was found by mankind. Inside were details, left behind by an ancient civilization, of a seven thousand year war against the a man named The Millennium Earl. The Cube told of how the Earl was stopped and how in the future,  special people would be able to fight against The Millennium Earl when he returns and tries to to destroy the world once again.
         The story really revolves around eight people and a bunch of exorcist. They are named Allen, Lenalee, Lavi, Kanda, Komui, Cross, Krory, and Miranda. They fight akuma to try to get closser to the Millennium Earl. Akuma are the souls of the dead that were brought back to the body of a person who wants them back. The akuma souls kill the soul that wants them back and either kill or eat inocent people and gain levels. They start from 1 and it goes 1.5, 2, 3 and 4. The danger of akuma is that they have special powers that kill in just a few seconds. There has never been a cure found.
          The powers of the akuma are: Poisonous Blood- The blood of Akuma, known as "Akuma Oil", is filled with dark matter, making it deadly to humans. Skin contact can cause the worst. It's a deadly virus that makes star pentacles appear on the skin, starting at the spot touched, before it spreads out, covers the body, and ends in the body breaking down. At its middle, it can result in fevers, illness and difficulty breathing. The effect of the virus is not as bad for parasite-type Exorcists, who can purify the virus within their body.
        There is also:

• Blood Bullet: The signature skill of Level 1 Akuma and an optional ability for Level 4. An akuma can change their blood into bullets and fire them at their targets, a good hit resulting in a quick spread of the Akuma blood virus through the targets system and a quick death if the situation is not fixed. (No cure though)
• Toxic Gas: When bodies of Akuma and those killed by the Akuma blood virus are left to fester, their blood sinks in and leaves a toxic gas in the air that can be fatal if inhaled too much. 

           When the Earl returned as "The Cube" said it would, a group known as the "New World Alliance" founded a place known as the Black Order and brought in many pieces of "Innocence" to equip them to new "Accommodators" as they call them. Innocence is the power used so that excorsist use to fight the Millennium Earl and accommodators are what the people are called. Only one accommedator can use one innocence or else they die if they force it . there are 109 pieces of innocence and forty one of 109 pieces of Innocence have been collected by the exorcist, though this does not count for the pieces that were destroyed when the Noah clan began killing exorcists. 
   The Black Order in all of its branches have several main goals that they wish to achieve, regardless of the personal missions of others:

• Collect Innocence.
• Find and train Accommodators.
• Locate the Heart. (The name of the object created after all of the pieces of innocence are collected)
• Defeat the Millennium Earl and the Noah Clan in the final confrontation. 

           The Noah Clan is a group of fourteen humans whom have the "Noah Gene" within their bodies activated. The Noah gene is when 14 humans gain the powers and memories of the original Noah's. However, they also get the hatred of the original Noah's as well they follow the Millennium Earl. They follow the will of the Noah blood within them and the Earl of Millennium.
          All humans on Earth are the descendants of Noah and his family, who survived the "Great Flood" and populated the Earth once more. At their best, the Noah Family will have fourteen members, including the Earl of Millennium . When one of the members dies, the same Noah will awaken in a new human, though they  have a new human name and a new human ideal of mind.
          Every member of the Noah Family is known as an "Apostle", and each Apostle has their own Noah name, though a few will choose to use their human name. Each Noah can decide if they want to remain in their human forms or in there Noah forms. When they are in their Noah forms, they are known by their dark gray-like skin, amber colored eyes, blue-like black hair (with the exception of Jasdevi, Wisely, and Allen(Names of Noah's)) and a black cross-like markings that go across their foreheads, called stigmata.