Rainoga

The Obsidian Cinderfalls stretch across a brutal volcanic plateau on the outskirts of Phlegethos, where rivers of molten obsidian surge from charred fissures and plunge into roaring pits of fire. These cascades perpetually boil and re-harden, only to shatter under their own weight, releasing storms of razor-edged black glass that scour the land below. The ground is slick, fractured, and treacherous—each step a trial by pain. Abyssal Tieflings, bound by infernal tradition or condemned by cruel decree, are forced to undergo rites of passage here, traversing the lethal terrain barefoot while their cries echo against the obsidian cliffs. Diabolical engineers from the courts of Fierna and Belial frequent the site to trial infernal siege constructs, their machines judged not only by their might, but by their endurance in the hellish heat. Harvested shards, cooled and tempered in agony, are prized as cores for cursed blades and infernal ammunition—each piece steeped in torment and fire.

A charred black plateau seethes with molten rivers of obsidian, cascading like dark fire into glowing chasms. Shards of glassy black rain down amid sulfurous smoke, glinting with crimson heat. The cliffs loom like jagged fangs, while Tiefling figures limp barefoot through the glass-strewn expanse, their skin aglow with pain and defiance. Towering infernal war machines stride through the haze, tested against the fury of the falls.