Astral Tartarus

"Welcome... to your future. Welcome... to Astral Tartarus."

- Saint Germain

Astral Tartarus is the plane that separates the timelines, and is the area that the Time Hunters must access in order to traverse to another timeline to change history. Saint Germain refers to it as a "place where all time is held prisoner." Its appearance consists of multiple objects from different timelines and debris scattered throughout it. It is supposedly a grim representation of the Present timeline's future.

Appearance
Astral Tartarus takes the form of a world that is completetely covered by an ocean. Above the ocean, floating islands are present. Around the perimeter of these islands are floating debris and destroyed cars, as well as withered versions of the Cogs of Time. The only point of interest in Astral Tartarus is Tartarus Tower, which is used to transport the Time Hunters to another timeline.

History
Astral Tartarus was created by Saint Germain as a way to traverse the timelines, and he created it so that it shared appearances with the Stage of History, but also had elements of other timelines so that it looked different. When the time anomaly began, Astral Tartarus suffered damage.

Trivia

 * Hence the name, it is based on Tartarus, the main dungeon from Persona 3.
 * Its appearance is also based on the End of the World stages from Sonic The Hedgehog (2006).
 * Astral Tartarus is where Bro Warriors ' purple comes from. The color purple is used for Astral Tartarus to symbolize its utter mysteriousness and the human subconsciousness.