Purgatory

Purgatory is a supernatural dimension created by God to contain the most dangerous beasts, Over time, it became the destination of the souls of monsters and the worst people out there.

Purgatory may be adjacent to hell, but implied it was quite difficult to access directly.Only inhabiatants who find a way to escape though it's rare knew how to locate it and therefore, create a passage to it.Purgatory functions as a prison and the final realm of souls. A spell can be used to get to Purgatory through a lunar eclipse and blood from one of Purgatory's natives. This spell could also be reversed in order to return the souls back into Purgatory.

Conversely, beings other than monsters may also find themselves transported to Purgatory; the Bone Of Righteous Mortal Washed In the Three Bloods of Fallen is shown and implied to send anyone near the person it's used goes directly to Purgatory along with the Leviathan. When something other than a monster enters Purgatory, it seems that monsters that are there can sense the foreign beings, as word seemed to travel fast that a human and an angel had been sighted in Purgatory.

Because Purgatory was not designed to hold humans, there is a portal located in Purgatory which will become active when humans are near it, and will send any humans who enters it back to Earth in the Hundred-Mile Wilderness in Maine; it was indicated that the portal was created by God as an "escape hatch" in the event that any humans became trapped in Purgatory.

There are estimated to be 30-40 million souls in Purgatory. In Slade Strikes Back, These multitude of souls were sought by Slade the leader of Slade's Ensemble and M.O.D.A.B's 2nd in command Bender, who both agreed to work together and use the power of the souls for their mutual goal to Stop The Joker, while Bender and Slade did it for their own reasons like Bender to stop Joker's outright aclopaystic plans and Slade to elminate The Joker from conquering his empire and stopping others to do so. The pair attempted to locate Purgatory by way of capturing and torturing different monsters, whch Slade considered to be False Disney Stars.. This attracted the attention of a very angry mother of False Disney Stars, who was at first content with the natural order, but was convinced that she needed to protect her children and her realm. She began to arrange for her children to create armies of their own and to summon her to Earth.where she planned to turn all human souls into monsters in order to increase the power of her realm and to deplete Slade of future resources. However, the struggle resulted into her defeat through Dib.

Slade and Bender both eventually find the door, through the use of the horsemen of the Apocalypse and the rings that keep them from using their powers which they win in a multiuniversal auction where The Joker also attended so he can enslave them to start the apocalypse while Slade and Bender use them to try to prevent the apocalypse. Bender wins the auction and Joker tries to kill both of them so he can get it by default. Slade and Bender summon them and use a binding spell to have them reap souls so the two can find Purgatory. They do and then steal a great deal of the souls which they use to stop Joker, and Slade uses his half to maintain his power and then sends them back afterwards know that he found a way to replicate the power.

Ironically The Joker is in Purgatory and many of the worst villains are there.