My Master, My Enemy

He rescued her, making her his only disciple, forging her into a weapon. She loved him deeply. Until he announced a political marriage and publicly berated her. She joined the enemy, confronting him in uniform. Her master was now her mortal enemy. The war he ignited tempered her into a deadly blade. With their bond destroyed, love and hate as bargaining chips, who bows first in this high-stakes gamble?