Forgotten Realms [Faerun

Phlegethos, Hell's fourth layer, is a volcanic inferno ruled by Belial and Fierna. It's Baator's judicial hub, a fiery wasteland of lava rivers, ash hills, and magma seas under a starless sky. Extreme heat enhances fire magic, weakens water, and fuels frequent eruptions. Abriymoch, the sole city, sits in a caldera, while the Pit of Flame serves as punishment. Sentient fires burn the unworthy, sparing natives and devil-authorized beings. Hamatulas patrol, spinagons labor, and the rulers maintain a competitive alliance. Rich in minerals, Phlegethos is chaotic yet vital, where devils navigate complex laws amidst the ever-present flames. Stygia.