The Nine Hells

Avernus
The First Circle of Hell is also the "topmost" because Astral travellers would emerge from colour pools on this layer and reaching the next circle required descending to the lower depths to breach a barrier to Dis.

Avernus is a desolate wasteland with rocky terrain, sparse, twisted vegetation, concealed snake pits, caves and warrens, volcanoes, and rivers of magma. The ground is littered with the detritus of countless battles, and blood trickles out of the ground in vein-like streams eventually flowing into the river Styx.

The sky is starless, full of choking smoke, and glows a dark red due to balls of flammable gas that float about or streak across the atmosphere.

Zariel, The Fallen is the current ruler of Avernus, after Lord Bel, the former lord, was demoted to being her advisor by Asmodeus. She resides in a soaring basalt citadel.

Zariel, The Fallen is the current ruler of Avernus, after Lord Bel, the former lord, was demoted to being her advisor by Asmodeus. She resides in a soaring basalt citadel.

Dis
The Second Circle of Hell when described as its own layer, is a flat barren plane containing little more than black, stagnant rivers, stretching for thousands of miles until it reaches some rolling hills.

The sky is a cloudy dull green shot through with lightning. In the centre of this plane rises the Iron City of Dis, several miles in height and hundreds of miles wide. The foul rivers radiate from a moat big enough to be called a lake surrounding the Iron City.

Dispater, Father of Strife is the current ruler of '''Dis. Paranoid and reclusive, he never leaves the inner sanctum of the Iron Tower at the centre of the city of Dis'''. He is stoic, emotionless, and expressionless. He remains this way constantly even in the heat of battle and while committing acts of unspeakable evil.

Minauros
The Third Circle of Hell is an endless bog of vile pollution, decaying bodies, and rotting marsh, repeatedly drenched by rain, sleet and hail storms.

The soggy, bone-strewn, disease-ridden swampland makes movement very difficult and is only broken occasionally by serpentine ridges of volcanic rock.undefinedNameless creatures even the devils fear inhabit the swamp.

The huge stone city of Minauros the Sinking is located here, so called because the weight of the city causes it to continually slip beneath the slimy waters; only the endless efforts of thousands of slaves prevents it from doing so. The city sits in a marshy bowl in the centre of these volcanic lands, and is constructed of a black stone gleaned from another plane

Mammon of Avarice is the current ruler of Mammon, Despised by his peers, no one trusts Mammon thanks to his record for duplicity. Condemned to his stinking mire, he dreams of one day throwing off Asmodeus's curse and attaining his rightful place, with Glasya at his feet.

Phlegethos
The Fourth Circle of Hell is the Hell that most resembled the stereotype of a fiery world of eternal damnation, filled with active volcanoes, rivers of liquid fire, molten rock, ash hills, smoking pits, unbearable heat, all wracked by tremors and earthquakes.

The city of Abriymoch is the seat of power in this realm, built of hardened magma, obsidian, and crystal in the caldera of an extinct volcano which provided visitors some protection from the elemental environment found throughout the rest of the plane.

Lady Fierna is technically the current ruler of Phlegethos; in truth it is her father Belial who is the power behind the throne. Belial advises his daughter in the arts of love and pain, taking a personal hand in ensuring she learns all there is to know. Up until now, the situation suited Fierna just fine. But thanks to her flowering relationship with Glasya, she has become more interested in taking Phlegethos in more than just name.

Stygia
The Fifth Circle of Hell is a freezing layer of cold and ice dominated by a murky ocean fed directly by the River Styx. The dark sky is constantly filled with lightning storms, and the ice may be lit by weird cold flames.

Tantlin, the City of Ice, is built on a huge ice floe with a large harbour to the river Styx, and is ruled over by a huge pit fiend. The lack of any kind of law enforcement leads itself to gangs controlling much of the city.

A few floating islands were the only non-frozen ground in Stygia, their peaks wreathed in lightning arcing from the coal-black sky.

Lord Levistus is the current ruler of Stygia, Asmodeus imprisoned Levistus in ice for a past betrayal, namely attempting to ravish, and eventually killing Bensozia, consort to Asmodeus and mother to Glasya. Levistus was, for millennia, trapped within his tomb, unable to act, but recently Asmodeus made an inexplicable gesture to his lover's murderer, displacing the formerly loyal ruler of Stygia, Geryon, and passing the position over to the frozen prince, though leaving him trapped within his tomb. Levistus rules his layer via telepathic instructions issued to his many Amnizu courtiers.

Malbolge
The Sixth Circle of Hell is a steep, infinite craggy incline often subject to avalanches that crushed most anything that got in the way.

The copper-shod redoubts were teardrop-shaped or otherwise engineered to deflect tumbling boulders, but even those could not long withstand a direct hit from a major avalanche

Glasya, The Dark Prodigy is the current ruler of Malbolge, a Princess of the Nine Hells and ruler of the sixth layer of Hell. She is noted as one of the most powerful and influential of the female devils and for being the daughter of Asmodeus.

Glasya was once Mammon's favoured consort. However, this relationship changed when Mammon sided against Asmodeus in the Reckoning. Mammon slunk back to the Lord of Hell and Glasya was taken from him and appointed Queen of the Erinyes, a position she absolutely despised. Since becoming Lord of the Sixth, Glasya has had a thriving friendship with Fierna, which frightens Belial as his 'loving' daughter may believe she no longer has any use for her manipulative father.

Maladomini
The Seventh Circle of Hell is a colossal maze of passages each several miles across that eventually led to Cania, Malbolge, and Nessus

The Seventh Hell is filled with ruins of old cities, stagnant rivers, exhausted and abandoned quarries and strip mines, stone aqueducts and lava canals, decaying fortresses, swarms of biting flies, and black pools of ichor that erupted from the ground. The Lord of the Seventh was never satisfied with the construction of his capitol and repeatedly built and abandoned city after city.

The largest and most beautiful was Malagard, a sprawling metropolis/palace/fortress/arcology with myriad black towers linked by a tangled web of bridges and walkways. Malagard was rumoured to contain a million rooms and to cap an equally complex dungeon labyrinth.

Baalzebub is one of the most powerful archdevils. Formerly a celestial archon known as Triel, he bore the titles Fallen One, Lord of the Flies, Lord of the Lies, and The Slug Archduke. The last refers to the form he was cursed with after the Reckoning of Hell; Asmodeus has made his natural form that of a filth-covered giant slug with tiny arms.

Cania
The Eighth Circle of Hell is a bitterly cold-dominant realm of solid ice mountains, titanic, unnaturally fast-moving glaciers and nearly continuous snowfall that made Stygia seem balmy by comparison. But on the positive side there are few creatures that hunt in the icy wastes.

Early lore describes the great citadel Mephistar as being constructed of iron,undefinedbut later reports say the Lord of the Eighth's fortress/palace was made of ice. All accounts seemed to agree the tower had a heated, luxurious interior and sat atop a gargantuan glacier called Nargus whose speed and movement were under the control of Mephistopheles himself.

Mephistopheles, The Lord of No Mercy and The Cold Lord, was the main opponent of Baalzebul during the Reckoning of Hell, and still holds a claim to his own layer. He seeks to take Baalzebul's layer away from him, that he may gain enough power to one day challenge Asmodeus for ruler ship of all the Nine Hells.

Mephistopheles is something of a walking contradiction. Unstable and thoroughly wicked, he presents multiple faces to those he meets. On the one hand, he can be charming, erudite, and civil. But beneath the veneer of respectability is a vicious temper and unchecked ambition.

Nessus
The Ninth Circle of Hell is a place of pits and ravines of virtually endless depths. The great citadel of Malsheem lies immediately below the portal between Cania and Nessus and is the largest fortress in all of the Outer Planes. Here, Asmodeus rules over the entire plane, and thus the entire race of devils.

The surface of Nessus is a plain shattered by rifts deeper than the deepest ocean trench. Many of the ravines and canyons here reach thousands of miles into undifferentiated, dead stone. Rumour has it that an offshoot of the River Styx flows here and there, dropping into trenches and trickling its way across the layer.

Asmodeus, Prince of Evil was a lawful creature with the goal of becoming the supreme creature in the multiverse even if it required destroying the current one and creating a new one. He genuinely believes that a bright future awaits the multiverse, if he was to rule it. As arrogant this claim sounded, Asmodeus has the competence to back it up.