Fields of Blood

Fields of Blood are a domain of Rage, Imperial God of Blood, War, Anger, Conquest and Slaughter. It is located within a broken realm of Gehenna, and, by extension, afterlife of Imperial Religion. As such its exact location is hard to discern, for it exists in a place when space and time are - to a point at least - foreign concept.
All descriptions of this place come from summoned daemons and Dead of Rage, plus of course his Chosen Ones. They are rather subjective, on the other hands his servants are not especially fond of lies and deceits, meaning that they can be considered pretty believable.
Dead that are condemned to Fields of Blood can be summed up by the name of their god. Rage. Murderers that killed in rage. Warriors that fought consumed by rage. Many primitive tribes that still remain in Karadia often consider Rage their god and are actually happy to go to his afterlife - this is a sum of their dreams.

Geography

Fields of Blood are described as a neverending plains of short grass. It actually looks like eastern steppes, but there are two defining differences. First... is that there is no water here. Rivers, rains, lakes... they are all replaced with blood. It doesn't clot and looks like red and not transparent water, but smell and taste leaves no doubts.
Second are towns and villages. Each of them surrounds a single 'hill' of stone, which peak can be accessed via a stone stairs. Atop them, neverending contests of strenght take places. Daemons and Dead alike participate in them. Whoever is crowned as the strongest can rule over entire town... or go to Bloodthrone.
Bloodthrone is a personal palace of Rage. It moves around Plains, pulled by thousands of massive creatures that Rage himself defeated and forced to it - if stories are to be believed, some of them are Old Gods that lost against him during Dawn War. There the mightiest warriors of Plains of Blood duel to choose mightiest and strongest of them all. In front of their god. For honour of becoming a part of his court.
Besides roving hordes of bloodthirsty wannabe conquerors (daemons and Dead alike) that murder, pillage and rape everything they come accross, the plains are also filled with various murderous daemonic beasts, daemons or ever raging deities and demigods.

Type

Dimensional plane