The Creation of the Mortal Plane

In the depths of the timeless void, before the existence of the mortal and astral realms, there resided the divine Pantheon of the Old Ones. These powerful beings, unaware of the impending darkness, dwelled in their astral planes, overseeing the vast expanse between them. Unbeknownst to them, a sinister force stirred in the depths of the void. The Eldritch Abominations, ancient and starved, began to awaken from their eons-long slumber. Hunger drove them to wage a horrifying war against one another, unleashing destruction upon the outer void. For centuries, the clash of these abominations echoed through the realms, signaling a far greater and more formidable force lurking beyond. As the catastrophic battle subsided, two dying Nebula Horrors crashed through the heart of the gods' realms. Their impact shattered the celestial boundaries, severing the links between the divine planes. In this cataclysmic event, the Mortal realms were born, intertwining the astral and mortal planes, forever changing the course of existence.
From the unleashed power of the dying Nebula Horrors, the original Primordials emerged into being. These beings embodied the very essence of emotions, ideas, and elements, representing the fundamental forces that shaped the universe. The gods, gradually recovering from the chaos, ventured into the newly formed Mortal realms, discovering the enigmatic Primordials.
Initially, harmony seemed to prevail, but over time, the Primordials became corrupted, their essence tainted by malevolence. As their corruption grew, a devastating war erupted between the Primordials and the Old Gods. The clash between these titanic forces inflicted heavy casualties on both sides, as the endless cycle of slaughter continued.
In a climactic showdown on the Mortal Planes, the remnants of the Old Gods united to face the Primordial of War, the most formidable of their adversaries. One by one, the gods fell before its overwhelming might, unable to stand alone against its unstoppable fury. Realizing that victory required a desperate measure, the remaining gods devised a plan to seal the Primordial away, bringing an end to the war once and for all.
With the last vestiges of their divine power, the gods launched a final assault. Only a handful survived the perilous journey to the heart of the Primordial. United atop its colossal form, they gathered every ounce of their remaining strength and sacrificed themselves to enact the sealing ritual. The essence of the Old Gods merged and bound the Primordial, imprisoning it away from the realms.
However, amidst the sacrificial chaos, the Old God of Life still lingered, albeit fleeting. With her dying breath, she bestowed a final gift upon the Mortal and astral planes. With a surge of energy, she scattered the seeds of life across the realms, nurturing the birth of the World Tree. From its grand trunk sprouted the new seeds of minor deities, soon regaled as the Dawn War Pantheon, destined to carry on the divine legacy.
Thus, the world emerged, forever shaped by the clash between the Old Ones, the Primordials, and the sacrifices made. Life bloomed across Illandria; the fallen bodies of the Old Ones and Primordials becoming the seeds of new races that would emerge. Humans, Elves, Dwarves, Leonin, various monster based races, and more bloomed into the world.