Osiris

Osiris was an Egyptian god who is putting people who feel guilty on trial, and sentencing them to death.

Season 7
Osiris went a local bar where he would find people who felt guilty. He would later grab Matthew Hammond, Christopher Fisher, and Warren and took them to his court where he would trial and condemned them. Dean bumps into him in a bar, where Dean tells his guilt to the bartender. After Dean leaves the bar Osiris takes to a farm where he puts Dean on trial. Sam comes in and becomes his lawyer, and Osiris calls witnesses, Jo, Sam, and Dean himself. In the end Dean is guilty and Osiris tells that he is going to die soon but in conclusion of the episode Sam uses a Ram's horn and puts Osiris in a centuries sleep freeing Dean from dying but not the guilt that he is feeling from the things in the far past and for lying to his brother about Amy Pond.

Powers
 * Invulnerability
 * Telekinesis
 * Teleportation
 * Superhuman Strength
 * Immortality
 * Superhuman senses
 * Telepathy
 * Power to summon and control ghost

Mythology
Osiris also Usiris, is usually identified as the god of the afterlife, the underworld and the dead.

Osiris is at times considered the oldest son of the Earth god Geband the sky goddess Nut, as well as being brother and husband of Isis, with Horus being considered his posthumously begotten son.

As ruler of the dead, Osiris is also sometimes called "king of the living", since the Ancient Egyptians considered the blessed dead "the living ones".

Osiris is not only a merciful judge of the dead in the afterlife, but also the underworld agency that granted all life, including sprouting vegetation and the fertile flooding of the Nile River.

The Kings of Egypt were associated with Osiris in death — as Osiris rose from the dead they would, in union with him, inherit eternal life through a process of imitative magic.

Osiris was widely worshiped as Lord of the Dead until the suppression of the Egyptian religion during the Christian era.