Death is a being of indeterminate true form, a creature that occupies every single space and moment at once, every single plane of existence, every single world, timeline and reality, yet only makes its presence known in one layer of existence - The Boundary. Death serves as a shepherd of lost souls, the deceased and those close to death leading them to their final resting place or the next stage of being.
Most of the confirmed information we have on Death either came from the Goddesses or Death itself.
We do not know how Death came into this or any other world. Before the celestial abandonment, the Goddesses confirmed that they did not create Death and do not have any control over it, but that it seems to have influence over all layers of existence. We do not know the full extent of its power and we do not know whether it came to dwell in the Boundary or whether it created it.
Some of the powers Death posseses include:
Omnipresence - Death seems to be a constant observer of the mortal realm and possibly all other realms. Its eternal presence makes it aware of all on-goings and gives it close knowledge of every individual. Despite its endless knowledge, Death chooses to keep most information to itself, only sharing things a soul already knows or the rare fact explaining its own being.
Crossing between layers of existence - Death is capable of crossing and carrying souls across all known layers of existence. It is possible that if further layers exist, it may be able to carry souls across into the unknown. The only other known beings with an ability similar to this are the Goddesses themselves, who can bring souls to the Celestial realm.
Healing - Death is a being capable of healing any wound or illness of the living, but only preforms this action rarely. Based on the reports of near-death scenario survivors - Death has revealed itself to them and offered them a second chance at life before they woke up. This ability explains tales of miraculous recoveries and unbeliavable survival stories. It is unknown what criteria Death uses to choose who gets a second chance, but it is generally understood that it does not offer healing to creatures who are beyond saving - for example, in case of beheadings. It has been reported that the choice was presented to them in the form a handshake - offering eternal peace if it's bony hand is taken, and offering another chance at life if its flesh hand is taken.
Illusions - as a being of incomprehensible form, Death is a master of illusion, capable to present itself in a form that the dying individual will find most easy to understand or the most comforting. The form it takes on can also be influenced by cultural backgrounds, leading to differing depictions of Death between different nations. It is possible Death can also take on the appearances and voices of our closest loved ones to bring us final comfort or forgiveness. Death is also capable to use its power of illusion to create "death dreams" for dying individuals, bringing them peace in their last moments.
Empathy - Death's most unusual power is its remarkable ability for empathy. Despite its omnipresence and knowledge of every evil in the world, it still chooses to treat every soul it carries with kindness, warmth, and as a friend. Death is capable of making every soul who has done great wrong in life understand what path led them to their choices and eventually guide them towards self-forgiveness. How long this process of healing and forgiveness takes does not depend on the amount of wrong done by the soul, but on the individual soul, how much they resist or deny, and their perspective of their life. It has also been reported that Death has helped talk individuals out of taking their lives and there were many survivor accounts of Death offering comfort or even crying for their fates.
The realm Death occupies is called The Boundary. The Boundary is a layer of reality that encompasses the mortal realm. Its appearance seems to be very subjective as most accounts differ - Some people describe it as a desolate and cold place, some describe it as a sunny paradise and some describe being within The Boundary as being in the mortal realm, but existing outside of your body.
The only detail shared by all accounts is the presence of thin silky thread covering great amounts of the realm, starting at the soul of each living thing, stretching out before disappearing into an uknown place - these are believed to be threads of fate. The Boundary is the first layer of existence where these threads become visible. It is unknown where they lead or what they stem from, but most humans are incapable of reading their contents. It is impossible for both the living and spirits to affect them through touch or magic. Some threads have been observed to split into multiple different ones or lead to multiple different individuals.
The boundary is the only layer of existence that can be fully observed by living beings without the intervention of non-mortal forces. Either through spiritual power, curse, near-death experiences, illness, or through dreams. It is theorised that humans are able to glance into the Boundary during sleep as most of the processes in their body slow, bringing them as close as possible to a death state while still alive.
Due to the fleeting time the living can spend in the Boundary, it is not known what other beings occupy this realm. It is reported that Misfortune Weavers roam the Boundary, but other creatures residing in this mysterious place continue to only be a thing of legend and theory.
Both Death and the Boundary continue to confuse researchers all across Planea, their purpose, origin and extent of power may never be fully comprehended by living beings. Perhaps it was never meant to be understood.