Double-Sided Swordsman

The place where the story takes place is a continent full of mystery and fantasy, the continent of Alanias; At the beginning of the story, there is a contract that coexists glory and evil, a dark soul-eating contract; The context of the story is a counterattack intertwined with killing and revenge, and the destruction of the Left Hand of God; The protagonist of the story is a young man who is a mixture of destruction and rebirth, Ivan, the successor of the magic sword. As for the story, yes, the story has quietly happened...