Tartaros

One of the three major dark guilds and a member of the Balam Alliance alongside Oracion Seis and Grimoire Heart. Nothing else is known about them yet.

Trivia

 * In classic mythology, Tartarus, or Tartaros is a deep, gloomy place, a pit, or an abyss used as a dungeon of torment and suffering that resides beneath the underworld and was ruled by Eris, the Goddess of discord.
 * According to history, it is primarily the prison for defeated gods; the Titans were condemned to Tartarus (or Tartaros) after losing their battle against the Olympian gods.
 * Based on Greek mythology, Tartaros is a primodial god that is the son of Aether and Ge; and by his mother Ge, the father of Gigantes, Typhoeus and Echidna.