The Beast
At the advent of the Calamity, this creature crawled from the bowels of the Mediterranean to destroy Rome. It afterward left a trail of carnage stretching all across Europe and down the Middle-Eastern coast, until it finally came upon Jerusalem, where it burrowed deep in the earth beneath the city and sleeps their yet. It has seven heads and ten horns, and upon each horn, it wears a black crown.
Cherubim
Once the Living Beings sitting before the Throne of the Almighty, now exiled to Earth in the wake of the Calamity. They number Four, and rarely venture into human lands. They appear as six-winged lions with four hears: one of an ox, one of an eagle, one of a lion, and one of a man. They wield many powers, but they are most known for their true sight into all things, embodied by the thousands of eyes decorating their wings.
The Dragon
The Divine Enemy, slain by the Arch-Angels. Somewhere, his ruined carcass lies, ever bleeding, though life has long since fled him. In the pools of his blood, the dominions of Hell can be witnessed and, where enough of it has collected, demons may enter the world.
Dybbuk
The dead, released from Sheol by the Key of Hades. They are mad spirits, incapable of reason, possessing corpses and killing indiscriminately. They are powerless without a lifeless body to use as a host.
Emim
Wraiths escaped from Sheol, wholly divorced from the physical world. They are the spirits of psychics long dead whose powers prevented them from losing consciousness in the afterlife. Millennia of imprisonment in the realms of the dead has left them cruel and ruthless, though unlike the Dybbuk, they can be reasoned with. They still command their formidable powers, in addition to emitting a field of supernatural horror. They are completely invisible to normal vision and can only be detected by psychic perceptions.
The Locusts of Abaddon
Horrible creatures the size of horses, covered in armor-like chitinous plates. They have crowns of horns upon their heads and great manes. With their jaws, they can tear a man's head from his body whole. Their tails are barbed and contain deadly toxins. The beat of their wings is enough to cause dust storms.
Nephilim
The Sons of Semyaza, half-human and half-angel and corruptions of both. No two look alike, but all are hideously deformed in some way. The only trait common to them all is the legacy of their celestial father: inhumanly beautiful faces. They are frighteningly powerful and are resistant to most weapons. Many are potent psychics.
Qlippoth
Demons. The denizens of perdition. They come in a multitude of shapes, and with varying abilities and powers. The most powerful are threats to entire cities on their own, being immune to nearly all forms of attack. Regardless, they all possess psychic abilities, and most are extremely physically powerful as well.
Rephaim
The chief servants of Abaddon, called the Murmuring Titans. Long banished to the bleakest pits of Sheol, they were born in rituals of necromancy, compiled from the bones of the greatest warriors to ever live. They constantly whisper in a hideous fiendish tongue, and prolonged exposure to their voices can lead to permanent psychic damage. They are supremely powerful physically, with skin like tempered steel, often wielding swords or axes to match their gigantic stature. Despite their size, they are deceptively fast, this trait enhanced by the hypnotic effect of their voices.
Sariel
The Reaper Angels. Rather than slay themselves in despair or attempt to remain true after the Calamity, they have taken up arms and donned the black robes of judges, to bring retribution to the world for its iniquities. They retain all of their theurgic powers and use them to horrific effect. They carry swords that absorb light in all spectrums, as well as psychic assaults. Being primarily spiritual, they are immune to most weapons, making them among the deadliest creatures walking the world.
The Sons of Megiddo
Warrior servants of the False Prophet, numbering 200,000. They wear blued steel breastplates and have been anointed in the Fires of Perdition. They are heavily armored and difficult to kill, and their breath is a poisonous, hallucinogenic smoke. They ride demonic horses with serpents for tongues and tails, whose poisonous bite deadens nerves and atrophies muscle.