The origins of the city of Metiphistos.
In the ancient days of the world each of the god created races possessed their own empire, within which the vast majority of their people were housed. Each of these empires sowed the seeds of their own destruction; the Yuan-ti allowed demons to sow chaos in their lands, the Hobgoblins created sub races to fill lower roles in their empire which then revolted. As each of the great empires fell the others poured in, overreaching themselves and collapsing from internal issues and external forces.
The great vacuum of the Fall of the First allowed a city known once as Heiron to conquer some of the world’s most bountiful lands. Named after Heironeous the Invincible, the god of Valor, the city was famous for its clerics and Paladins. Heiron slowly expanded its territories over the stranded cities and impoverished tribes left after the empires fell, and attempted to bring law back to those places they conquered. Initially they also left lands that were already well ruled to their own devices, and only interefered or conquered those that were cruel or chaotic. King Valrous the III created the modern course of history when he began to force those smaller states to provide Heiron with soldiers, since they were now safely enveloped in Heiron’s defenses. Most of the states agreed, but found that more and more demands were heaped upon them as time went on.
The success of Heiron slowly destroyed it, as its army of clerics and paladins became conceited and soft, as its citizens became wealthy and debautched, as its rulers looked into silver mirrors and found their reflections beautiful. The small nations who heaped money and soldiers on Heiron in return for its “protection” began to make secret alliances amongst themselfs against it, and the tribes along Heiron’s fringes became bolder and bolder as its army became more indolent. An Ogre warlord Named Orrgh gathered a massive horde to destroy the city of Heiron and bring down its empire, but he and his advisors agreed that the massive walls would repulse them without a more organized force to breach them. He thus sent his left hand, a female Yuan-ti named Stheietch, to the greatest of the kings of the lesser realms, an elf named Arast. Arast was a wizard of great regard, as well as the ruler of a large realm. The intelligence of Stheietch impressed Arast, and in return for her acting as his permanent advisor (and some say consort) the wizard-king convinced the alliance of small kingdoms to join with Orrgh against Heiron. The largest military force raised on the prime material plane since the demons were expelled was thus raised, and they marched on the city.
King Peleas the I of Heiron, Beloved of the Sun and Lord of Glory, begged the patron god of the city for aid, but they had secretly turned their hearts from him, and though he cried bitter tears of salt and fire, his angels stayed in heaven and he provided no miracles to save the city. Peleas in turn begged each of the gods of good for aid, to no avail, and then the neutral gods, and finally even the dark gods whose names were forbidden within the city. Finally, tears streaming down his aged and wrinkled cheeks, he asked for help from the dark forces of the underworld, and they responded. Metiphistopheles, the Lord of the Eighth and ruler of Cania, appeared before the aged king in his white tower.
The pact between the two is unknown, but the next day King Peleas commited suicide on a pyre of flames, with fags made of humans tied together and doused in oil. The screams caused discomfort even to the enemies outside the walls, and the next day as the sun set a portal the color of liquid blood appeared on the site of the great pyre. Through it thousands upon thousands of devils poured out, and they marched straight through the gates into the enemies camp. For the length of the night the battle waged, and as the sun rose the portal disappeared, leaving the devils already through it to continue the fight alone. The clerics and paladins of the city, long bereft of their power, through in their lot with the devils and attacked the invaders outside the walls. Few accounts of that battle remain, but it is known that Orrgh died before the sun set again, and the invaders lost all hope as the sun set. The portal flared open again in the night, and yet more thousands of demons and fiends came through. Arast died surronded by corpses, and the pit fiend that crushed his head collapsed atop him. When the sun rose once more the enemies of the city were destroyed, but the city was no longer Heiron. From that day forth it was known as Metiphistos by its enemies, and soon even its citizens agreed.