Demon Clan

The Demon Clan is one of the five major races in the world of Nanatsu no Taizai.

Overview
Three thousand years ago, the Demon Clan waged a great war against the Goddess clan, who had allied with the Human clan, Fairy clan, and Giant clan. They were ultimately defeated by the allied clans and sealed away in the Coffin of Eternal Darkness for many years. However, in spite of their fate, a few demons managed to escape from or avoid the seal completely, namely the Red Demon, Gray Demon and Fraudrin. Fraudrin would spend the last three thousand years trying to find a way to break the seal and to resurrect his clan, so they could take over the land of Britannia. Nine members of the Demon Clan, namely the Ten Commandments known to be a group of elite warriors handpicked by the Demon King himself, were resurrected when Hendrickson managed to break the seal in present day.

Appearance
Many of the Demon Clan have monstrous appearances. There are several known types, each with its own appearance, including the Red Demons, Gray Demons, and Blue Demons. However, at least some demons do not fall into these categories, namely the Ten Commandments and Meliodas. Of them, several have a human appearance. Human-like demons can be distinguished by their pitch black eyes. Some demons also have black markings on their face.

Physiology
Demons, unlike humans, have more than one heart. The removal or destruction of a single heart does not incur death, although it is painful.

Drinking the blood of a demon may give non-demons enhanced strength and magical power, if they are compatible. If they are not, they will explode. Demonic blood may naturally or forcibly turn the drinker into a demon themselves, a process that can be reversed either by removing their demonic plant or through the power of the Goddesses.

Powers and Abilities
The Demon Clan is an extremely powerful race, requiring the cooperation of the Goddess, Giant, Fairy, and Human Clans to seal. Many demons consider themselves above those of other races. Members of the Demon Clan share several common abilities:
 * Longevity: The average lifespan of a demon is much longer than that of a human, approximately 1000 years.
 * Black Matter: Demons can manipulate black matter to enhance both their offensive and defensive abilities. It has been shown to form various weapons and to provide significant resistance to physical attacks.
 * Enhanced Regeneration: Black matter can be used to piece together an injured demon's body and mend grave wounds.
 * Flight: Black matter can be used to form wings, enabling demons to fly.
 * A powerful, dark flame that is capable of negating regenerative abilities and even scarring an immortal.