Levistus

Even by the otherworldly standards of the Nine Hells, the realm of Stygia and its lord, Levistus, both occupy strange positions in the hierarchy. Stygia is a frozen wasteland of mysterious origin, a churning, murky sea covered in a thick layer of ice. Where the ice gives way to open water, immense icebergs drift on the unpredictable currents. Levistus is trapped within one of these bergs, imprisoned there by Asmodeus for reasons that few can even guess about. As part of Levistus’s punishment, Asmodeus decreed that he must offer escape and safety to the desperate, especially those who fear for their lives. A criminal might entreat Levistus on the eve of his execution, for instance, agreeing to exchange his soul for a boon that enables him to escape to safety. With nothing to do in his tomb other than answer distant entreaties from the Material Plane, Levistus has attracted the devotion of a wide variety of criminals, rascals, and ne’er-do-wells across a multitude of worlds. He continues to meet his quota of souls, both despite his lack of mobility and because of it. Being imprisoned means that Levistus can focus his full attention on such matters, which allows him to excel at what he does.

A Contested Realm

Levistus was not always the lord of Stygia. The archdevil Geryon previously ruled over the layer. The two constantly vied for control of Stygia. The conflict ended when Asmodeus brought down his punishment on Levistus, who was frozen just after his latest victory over Geryon. The displaced lord still schemes to supplant Levistus as ruler of the realm, but he can’t directly affect his foe, since the ice that imprisons Levistus is impervious to harm.
Violence does, however, remain a viable option for Geryon against Levistus’s servants. As such, Stygia has become a war-wracked realm. Any devils bound to either of the archdevils that aren’t needed for service in the Blood War engage in constant skirmishes across the ice, and yugoloths and other mercenaries from across the planes play a key role in the struggle. Both sides sometimes employ adventurers to seek out knowledge that could free Levistus or allow Geryon to vanquish him and ascend to the lordship.
Geryon fulfills his responsibilities in the soul trade by continuing to court mortals through his agents, offering them superior strength and great physical prowess in return for their allegiance.

A Frozen Wasteland

Every other layer of the Nine Hells has a function related to warfare, industry, administration, or commerce, but Stygia is an expanse of untamed, unimproved territory. Even so, it has its uses. All manner of unlikely beasts wander the frozen terrain and swim the seas, including remorhazes, krakens, mammoths, and even a few tribes of frost giants. These denizens have no fear of any other creatures, including devils, which makes the place an ideal proving ground. Lesser devils that need to sharpen their combat skills or improve their endurance before reporting to Avernus for duty in the Blood War spend time in Stygia. The cruelly cold environment, combined with the constant threat of attack, helps commanders assess their troops and place them into the various legions as appropriate for the skills they demonstrate.
The presence of so many creatures native to the Material Plane has led to speculation that Stygia was not always a layer of the Hells, but was previously a world on the Material Plane. Its inhabitants, facing annihilation, are said to have pledged their souls and their world to Asmodeus in return for a safe haven — whereupon Asmodeus kept his end of the bargain by transporting the world into the Hells. The archmage Tzunk has researched the topic extensively but has yet to find any evidence that truly confirms the account. If the supposition is true, then the riches of that world might lie under miles of ice and beneath frigid, monster-infested seas.

Though ice might hold my body in place, it has done nothing to contain my ambition.

— Levistus

Ruler of the 5th Layer of hell - Stygia

Aligned Organization

Lord's of the Nine