For many millennia (or longer), folks have used the Astral as the place to send their refuse: cursed items, magical experiments gone awry, and the unwanted who have been banished from their societies.

A group of warriors decided to take up the reins and control this aspect of the Astral Plane, creating a prison/warehouse for unwanted people and things. Pitiless has a reputation second only to Carceri itself as the most horrible prison of the planes.
The commandants of Pitiless are twin Doomguard members, Aorth With No Heart and Jaitch With No Spirit, who believe that contrary to what folks think, things do decay in the Astral. To prove their point, they created Pitiless to hold things there for a long, long time and observe the (albeit incredibly slow) changes. The brothers may differ in alignment (Aorth is more cruel, Jaitch is less controlled), but they work well together. Word has it that these two dwarves have been watching their charges in Pitiless for over a thousand years.

Pitiless is located in an area known as the Deadmind, because their are no drifting thought energies here. The psychic wind never blows. The prison itself probably created this zone, when all random thoughts that were here coalesced into astral searchers through the anguish Pitiless has caused. These searchers have long since left or been destroyed, and no there is only emptiness. This void within the void keeps out most astral creatures, including githyanki, astral dreadnoughts, and other dangers.

The masters of Pitiless employ a number of guards which many would consider peculiar allies for a pair of dwarves - a regiment of 50 well-trained frost giants. Nonetheless, the giants and dwarves respect each other and get along well enough. The giants' presence tends to make Pitiless a cold place (a person can always see their breath there, and many prisoners have forgotten what it is to feel warmth).

Rumor has it that a yugoloth (or perhaps a whole entourage of fiends) visits Pitiless on a regular basis, but the brothers deny it, so no one knows the purpose of the visits (if any). Darker rumors speak of one of the longest-held prisoners being a powerful red dragon; some say that Vlaakith, the First, locked him up over a thousand years ago and that the dragon is still alive in Pitiless's cells. Although, these rumors have been circulating for many years they are unsubstantiated. Few dare to speak these rumors, though as the people who utter it frequently seem to go missing.

NOTE: Each space is 10ft. by 10ft. and the ceiling is often at least 30ft. high to accommodate the height of the frost giant guards that patrol the prison.

*The design of the Pitiless Prison is a recreation of "Pitiless" from AD&D's Planescape: A Guide to the Astral Planes (2625). Rooms have been altered and portions added based on the vague information available in the accessory. Details of the rooms are inspired by the scant specifics available. Some things have been altered due to the limitations of Dungeonfog.*