Sheitans are ancient creatures that emerged from the depths of the Earth. Their appearance led the first survivors to compare them to demons, but they are not supernatural beings. They are living organisms.
Their physiology is radically different from that of any known species. Their bodies are extraordinarily resilient, they possess very few vulnerable vital points, and their capacity for adaptation is exceptional. Some varieties have even developed biological mechanisms capable of producing and expelling flammable substances.
They range from relatively small creatures that hunt in groups to colossal giants capable of taking on entire military forces by themselves. Depending on their lineage and the environment in which they develop, Sheitans can take humanoid, quadrupedal, or flying forms.
But their most dangerous trait may not be their strength.
It is their ability to change.
Generations born on the surface have begun developing new physical and behavioral characteristics, progressively adapting to a world that was never theirs.
Humanoid Sheitans are the most numerous variety. The largest can reach approximately two meters in height.
They are bipedal, highly aggressive, and make up a significant portion of the creatures encountered on the surface.
Quadrupedal Sheitans are somewhat more robust and slower than their bipedal counterparts, but they are equally aggressive and just as numerous.
Their heavier bodies provide greater natural protection against attacks, making them considerably more difficult to bring down.
Flying Sheitans are unique to the surface.
The species’ extraordinary adaptability has allowed some of the smaller Sheitans to develop membranes capable of sustaining flight, giving them access to an environment their subterranean ancestors never inhabited.
The smallest Sheitans gather in enormous hordes capable of devastating towns and cities.
Once a horde begins moving through an inhabited area, sheer numbers become their greatest weapon. Within hours, they can wipe out an entire city.
Far less numerous than the smaller varieties, Giants are enormous bipedal monsters that are practically invulnerable.
The appearance of even a single Giant can be enough to destroy an entire military force.
They are among the most terrifying Sheitans ever encountered.
Some Sheitans are capable of launching fireballs from their mouths.
They accomplish this through a specialized biological mechanism involving highly flammable gastric fluids. When these fluids are regurgitated, they pass through specialized bones known as ignition bones, which vibrate at extremely high speed and generate the spark required for ignition.
The resulting burning substance is expelled from the creature’s mouth.
Unlike ordinary fire, it is highly viscous and can continue burning for months.
The most colossal beast of them all.
The Dragon is a Sheitan the size of a mountain.
Maintaining a body of such extraordinary proportions forces the creature to spend most of its existence asleep.
But eventually, it wakes.
And when it does, it is the end of the world.
The Sheitans that devastated humanity are terrifying enough.
But others still remain beneath the Earth.
These subterranean Sheitans are physiologically different from those roaming the surface. They are more frightening in appearance and even more aggressive.
They retain the same general body types found among their surface relatives—humanoids, quadrupeds, and giants—but their anatomy reflects the hostile environment in which they evolved.
They look more terrifying.
They are more violent.
And they never left the world below.
The Giants of the underground are creatures adapted to life within enormous cavern systems, where extreme heat, fire, darkness, and hostile geological conditions have shaped their physiology.
Even more aggressive than their surface counterparts, they represent some of the most dangerous organisms inhabiting the depths of the Earth.
A unique Giant discovered deep underground, unlike any Sheitan encountered before.
Its appearance is so disturbing that there is little need for a more complicated description:
It basically looks like the Devil.
Despite its appearance, Teufel shows no greater intelligence than other Sheitans. What makes it exceptional is something far more immediate.
It is larger and more resilient than any other known Sheitan—with the exception of the Dragon.
The first generations born on the surface have begun to differentiate from their subterranean ancestors.
Some have developed fur, new body structures, and behavioral patterns increasingly similar to those of terrestrial animals.
Certain quadrupedal varieties form packs. They track prey through scent, rest together, and protect their young. Although they remain extremely dangerous, their behavior has become less erratic and more closely resembles that of a natural predator.
These changes reveal something fundamental about the species:
Sheitans are not static creatures.
Every new generation may be better adapted to Earth than the one that came before it.