Great Temple Dimension

The Great Temple is a mystical place, it houses the ultimate power in all of reality, Pandora's Box. The temple can only be entered through a fixed point from any one of a thousand dimensions, once every year it will appear in the same spot on every world, however to open the gateway into the dimension, three keys are required to open the great divide, and they are kept by three very powerful warriors in every dimension.

History
The Temple was created by the Demon Lords shortly after their formation to contain Pandora's Box, and over the next few hundred years the temple was attacked, and almost penetrated many times. And so the Demon Lords used their vast power to create a pocket dimension to house the Great Temple. One thousand random dimensions were selected to become the gateways once every thousand years to the Temples Dimension, the Demon Lords then created a life force limit on the temple, allowing only 7 beings to enter the dimension. Seven trials were created to protect the the temple, all 7 trials must be passed, even if only one person enters the temple, and if even more enter the temple, then only one will be able to take Pandora's Box and escape, this meaning that the others must be either dead, dying, willing to stay or in some way incapacitated as to not be able to prevent you from attaining the Box, the Temple will subsequently be locked in time and space, not allowing those within the Temple to escape.

Locations
The Temples gateway is usually found in an incredibly difficult to access area, on earth this area is the Bremuda Triangle. In Jasden where the gravity is over ten times what it is on earth, the gateway opens about 500 meters above the ground.

Guardians
Since the Great Temple Dimension has only ever been opened once on earth by Voto, so only earths guardians are known;