The Day the Armor Is Broken, the Day the Repair Is Destroyed

The fragile balance between the mortal empire and the immortal sect was crushed by greed three hundred years ago. Spiritual mountains were occupied, medicinal fields were seized, precious animals were captured, and children with some spiritual roots were taken away and never returned - mortals in this land were reduced from "co-residents" to "providers". The empire devoted all its efforts to develop armor-piercing weapons that mortals can control, using steel to fight against immortal magic.