An occult Earth of 13-hour days and 13-month years, locked in a perpetual mystic twilight. This Earth is home to Etrigan, rocketed from the planet Kamelot by Merlin, who as Superdemon defends this gothic universe alongside the terrifying supernatural defenders of the League of Shadows.
- This world is based on the earlier concepts of Earth-13 and (judging by the presence of Superdemon) Earth-17. Additionally, this depiction of a superheroic John Constantine/"Hellblazer" originally appeared in Doom Patrol #53, also by Grant Morrison.
- Earth 13 is opposite Earth 1 in the structure of the Multiverse.
- Earth 13 is one end of the "Light/Dark Axis" in the local Multiverse with Earth 1.
- Earth 13 is part of an area in the local Multiverse termed "The Gloaming" with Earths 3, 10, 15, 19, 37, 40 and 43.
- Characters from Earth 13
- Other things related to Earth 13
- Earth 13's Comic Appearances
- Reality Gallery: Earth 13