The Old Man Schemed Against Me from the Start, So I Had No Choice but to Become a God

To maintain the stability of the cosmos, another reshuffling of light and darkness is about to begin. Within the mysterious energy body known as the Eternal Core, the Light of Hope, destined to be the protagonist of this battle between light and darkness, comes into being. But what will happen when he, who should have become a deity of the light faction, unexpectedly absorbs a trace of dark power? Will this dark power become an unpredictable factor on his path to godhood, or a shackle holding him back...? What schemes and machinations lie hidden behind this seemingly ordinary struggle to balance light and darkness?