Namahar

Namahar is a universe in the multiverse. Namahar is unique in that it is a monotheistic universe with only a single god, Astreu the God Sun. Namahar is also the only universe whose Living Gate is buried underground on its world plane under the continent of Westmarch.

History
Thousands of years ago, due to the events of Asmodeus's Pride, the Living Gate was shattered and aberrations from X'dalzot spilled out into the world. Astreu used his divine power to seal the hole in the universe, but could only do so during the day -- at night, aberrations ravaged Westmarch with untold death and destruction. Astreu made a pact with the Drakovian priestess Lystunovra and sent a meteor to the Drakovian capital city of Layungrad, which sat on a massive underground deposit of mithril. The impact fused Lystunovra's spirit with the sphere of mithril and shot it into orbit, forming the moon. As a demigoddess and spirt of the moon, she became known as Layune, circling the world directly opposite Astreu. While Astreu slept, she reflected his light back to the world, sealing the hole while he could not. Unfortunately, her orbit was unstable, causing her to cyclically rotate in the sky. One night every 28 days, called "New Moonnight," she faces away from the world and cannot reflect light, allowing the aberrations to pour forth from the open gate.

Clerics on Westmarch were finally able to construct the Sunsphere, an artifact which gathers Astreu's energy over the course of 28 days and releases it on New Moonnight to seal the Living Gate while Astreu sleeps and Layune faces away. This prevented any further incursion by aberrations, but the damage had already been done -- waves of creatures threatened to scour all life from the continent. As a last desperate act, the halfling stone-sorcerer Ahal ben Galen performed a ritual to sunder the continent, breaking it into a cluster of islands to halt the aberrations' advance and give the last survivors of Westmarch time to flee across the ocean. The descendants of these survivors eventually formed the Alonian Empire.