Invincible Master in the City

Three years in prison gave him a blessing in disguise and unexpected gains; when he returned to the city and faced the enemy, he used iron-blooded means to fight back forcefully, and step by step he reached the top. When he looked back, the weak and the strong preyed on the cruel world, and there were corpses everywhere. Eighty thousand miles of turbulent winds and clouds, one general's success can lead to thousands of bones being withered!