The Necromancer Girl's Nine-Colored Psalm

This is a newcomer's first work, so please forgive me if it's not well written. Seven hundred years ago, a natural disaster of the undead swept across the continent. The catastrophe that almost destroyed the world ended with the dark forces being imprisoned in the Cursed Peninsula. Seven hundred years later, the peninsula remains a cursed place. The sky is always gray, and the undead and the living struggle to coexist, while the Holy Knights of Creighton outside the wall come in for massacre every year in the name of "Judgment Day." In this forgotten land, a human girl named Berna is growing up in a village of the living dead with her silent uncle Shadow Demon. When the oppression of the Knights escalated year by year, when the situation within the Dark Holy See suddenly changed, and when the patriarch woke up and tried to reform this decadent country with another way of thinking... Berna was pushed into the center of the storm. War is about to break out. The old gods are about to awaken.