Greetings, my dear reader! In this piece of work, you will find information about the idea of Tartarus. I wanted to write down all my thoughts in a (somewhat) ordered fashion about a sudden idea I had so that it may be implemented somewhere later. With introductions done, let's start with the first question: "What is Tartarus?"
Tartarus is a hellish dimension created by the Choir of Ruin – the primordial embodiment of evil. It is not known for certain whether it was created from one of the empty Spheres above the Primordial Sea or whether they only served as inspiration for creating the place. In any case, the dimension is very similar in structure to the previously mentioned creations. Tartarus is a reflection and physical embodiment of the ideas of the Choir, which are manifested in reality. It grew and changed over time, building up new layers and parts because the world was changing, and with it, the concept of evil was changing and evolving too. However, the older structures of this sphere were preserved and did not disappear with time. It is known for sure that it is possible to physically enter this place or project oneself into it. Also, this place has its own rules, and its far end is connected with the Far Shore, where the traces of the Ruin lie. It was this place that became the concentration of the residual influence of this specific primordial after the completion of reality creation times; all the power of the Dark Arts is concentrated there. Tartarus is just a threshold to enter the Ruin domain.
From the inside, it looks a lot like Gardens, but with a twist. When the Choir created this place, it was divided into areas that replaced each other as one walked farther. Each such area embodied some kind of evil that was predominant in the world at that primitive time. Initially, there were only four biomes that replaced each other sequentially: Hunger, Pain, Death, and Unknown. The border between the second and third area was the place of growth. If some new strong idea of evil appeared in the world, then its embodiment at some point pushed the central border and occupied a new place. It always occurs in pairs, so there is always a central boundary. And the new biome increased the area of the entire dimension – this is how Tartarus grows. We'll start with the last one of the areas because it affects all others.
Unknown is an area around the far pole of Tartarus. It embodies the ideas of fear of the unknown, the concept of oblivion, and destruction as evil in its purest form. It is an almost empty space without earth, air, or gravity, filled with rare shifting debris and impenetrable darkness. At the center of the Unknown is the Black Sun, radiating Black Light. This is the antithesis of energy, a phenomenon not like normal brightness of the world, which has substance and brings clarity. Black Light creates darkness and shadows wherever it falls. Directly near the Black Sun and in the Unknown itself, it is so "bright" that its effects become highly notable and dangerous. This light takes heat, greedily cooling everything around. It destroys ordinary light, drowns out sounds and electric currents, prevents any manifestation of energy, slowly erases and devours material things without a trace. Within such concentrated Black Light, the transmission of any information begins to be disrupted and slowed down, which can cause hallucinations, temporary memory lapses, and insanity. Fragments flying in the void are absolutely cold, stopped in time, and constantly changing their place, shape, and speed. They are able to refract the Black Light like lenses or prisms, generating invisible, thin, and dangerous rays that penetrate nothingness like a web. If one gets to the Black Sun, they would be in front of the Choir of Ruin, in its domain. One would have amnesia after entering though the Black Sun; only skills and personality will remain. The memory will return, but only when they leave this horrible place.
The Black Sun illuminates all of Tartarus with its Black Light, filling it with darkness and cold. However, the farther away one is from it, the less its effects are felt. Usually, only darker shadows and the need for brighter light to dispel the darkness are observed. Fortunately, if the Black Light is weak, it disappears around a being with a soul, giving rise to a faint glow of normal light. Therefore, at the entrance to Tartarus, one will never find oneself in pitch darkness - there will always be a weak aura of light. It can be both good and bad thing, because it is easier to see and be seen in some radius. However, the deeper one goes, the weaker this aura becomes. At the very beginning, the dimension was small enough that even at the entrance, it was completely dark and terribly cold. Only the properties and rules of biomes kept things from spontaneously collapsing under the Black Light's entropic might. Soon, however, the division intensified and stabilized, creating a gradient of the Black Light's power from one region to another.
On this note, let's talk about the other pole of the sphere - the Entrance - the area of Hunger. Anyone who somehow finds themselves in Tartarus will be in the vicinity of this pole and in this zone. Hunger looks like a barren wasteland filled with withered dead plants and starved rotten corpses. There are many ruins, no clean water, and no food. Any normal edible stuff there rapidly rots on contact with air or crumbles into dust. A dry, cool wind blows there, and it smells of autumn. One cannot stay in this place for a long time because over time, hunger will come faster and faster. The feeling itself will become more and more intense until it goes beyond what is possible to feel in the normal world with the physical brain. On the third day in this biome, the feeling of hunger will be debilitating and mind-numbing in itself, and the body will be reduced to the state of a skin-covered skeleton within an hour. One needs to hurry to the next zone, and one cannot let the food come into close contact with the air. But sometimes, people really want to eat, don't they?
The closer one gets to the Hunger border, the taller and weirder the vegetation becomes, making it harder to traverse. One can also encounter lonely flying creatures trying to satisfy their eternal hunger more and more frequently. This place is similar to the Ocean of Trees, but all the vegetation that appears there is dead and it is much smaller area. Only lonely Dearth, which wants to eat any living stranger, flaying around. It would be wise to hurry and go towards the border of Pain because abominations will start splitting and hunting one specifically at some point. However, they cannot travel too far into other parts of Tartarus. Nevertheless, it is possible to find ways and workarounds to shorten the journey. In Tartarus, altars and holy sites are scattered everywhere, performing rituals at which one can shorten the path, return to the normal world, receive blessings, and so on. But, of course, there is always a price to pay. Like, one
altar near the Ocean of Trees in Hunger require sacrificing a part of one's body, while others will only answer if one sacrifices someone they care about. There is always some price to pay, but it is not easy to decipher the meanings of rituals or their consequences.
Place could look something like this. It is not all of the Tartarus, but basic idea. I may change and expand it in the future.