The Fallen God’s Second Vow

Betrayed by his adopted son, the mighty ruler dies and reincarnates in a despised weak boy. Bullied by nobles, the male lead hides his ancient power. He shocks everyone by summoning sacred dragons and defeats enemies. The female lead notices he is no longer her familiar brother. A fake emperor rises to fight him. After winning the war, the male lead topples the old pure-blood system, yet faces a painful question: can his original soul ever return?