The Disgraced Scion: Forging an Army from War Relics

In the northern border of Daning, the flames of war never cease. The Lin family, a military household, is framed by powerful officials of the Armory Bureau, and the entire family is wronged. Lin Yue, the legitimate grandson, is demoted to a cannon-fodder auxiliary soldier, tasked with the most menial battlefield cleanup, wandering daily amidst mountains of corpses and seas of blood. After a major defeat in the north, on the brink of death, Lin Yue awakens the [Residual Weapon Tracing Furnace]. The system only collects discarded blades, shattered armor, and war horse remains from the battlefield; it cannot conjure divine weapons from thin air, only analyze remnants and deduce lost forging techniques from the previous dynasty. He picks up war relics to reforge, turning scrap iron into sturdy armor and sharp weapons. However, the reforged weapons accumulate battlefield metal stress, imbued with malevolence, requiring regular purification and annealing, or they will shatter and harm the user in battle. At the bottom rung, his merits are repeatedly stolen by superiors; the aristocratic families controlling military industry produce inferior armor that harms countless border soldiers; the barbarians burn war remains after battles, attempting to cut off all his resources. Lin Yue struggles to survive in the cracks, picking up war relics, reforging broken armor, establishing the Sharp Armor Camp, repelling powerful enemies, tearing open the dark conspiracies of the Armory Bureau's collusion with the enemy, and clearing his family's blood debt. He does not seek to split the realm with military force; instead, he offers the complete forging techniques, rebuilding the foundation of Daning's military industry, and with countless battlefield relics, guards the vast northern frontier. — Description from novelcodex.org