Well, Omni Man does die in the comics. The reasons behind it involve various plot developments and character interactions that shape the course of the story. It's a pivotal moment that changes the dynamics of the comic world.
Well, the death of Omni Man in the comics is a complex and intense event. It involves a series of conflicts and plot twists that lead to his ultimate fate. It's too detailed to explain briefly here. You really need to read it to get the full impact.
Chen Zhibao had crippled Xu Fengnian's second sister, Xu Weixiong, because he knew that Xu Weixiong was a suicide soldier left behind by Wu Su for Xu Fengnian. He liked Xu Weixiong and could not watch her die, so he had crippled her and made her stay at home. When Chen Zhibao and Xu Weixiong met in Beiliang, they seemed to be making eyes at each other. Chen Zhibao should like Xu Weixiong, right? Why was he so ruthless to Xu Weixiong in the end? Even if they weren't lovers, they shouldn't be so cruel for Xu Xiao's sake. However, the real reason was that Xu Fengnian wanted to kill Zhao Ke. Chen Zhibao planned to kill the dragon python together with the oriole behind him. Xu Weixiong stopped Chen Zhibao and stabbed the second sister with the plum spear. Later, the second sister survived and became paralyzed. Xu Weixiong lived in hatred. She was not Xu Xiao's biological daughter. Her family was dragged to death by Chen Zhibao.