I Went to Die for My Legitimate Son, and I Sealed Lang Juxu's Whole Family in Tears.

[Substitute + severed relationship + husband-chasing crematorium (family version) + decisive killing + system violence] Traveling across Daqian, he became Su Han, the unpopular concubine of the Duke of Dingguo. The barbarians invaded, and the imperial court conscripted the Duke's legitimate son into the army. Forced by his stepmother and indifferent by his biological father, Su Han was forced to join the army in his brother's stead and was sent to the frontline cannon fodder camp in order to save his eldest brother, Qilin'er! Before leaving, Su Han cut off his own flesh and bones and signed a letter of dissolution: "Today I will die for him. From now on, the life and death of the Su family has nothing to do with me!" No one thought he would survive. But three years later, the barbarian army came to the capital, and the civil and military officials in the court were in despair. A black cavalry descended from the sky like a divine weapon, with one person at the head, Fang Tian painted a halberd, and behind him a mountain of corpses and a sea of ​​blood! The barbarian emperor was horrified: "It's a human massacre! It's the killing god Su Han!" The emperor was overjoyed: "Quick! Please recognize Su Aiqing's ancestors and return to the clan and save me from death!" Duke Dingguo knelt down and cried bitterly: "Han'er, dad is wrong, please come back quickly!" Su Han looked down at the ants and waved his knife coldly: "Su Han died three years ago. I am the Lord of the North. I came to Beijing today just to change the dynasty!"