Re-Entering the Battlefield: I Can Upgrade Infinitely

In an era when spiritual energy is revived and demons invade. Chen Wudi was invincible on the battlefield all his life. After retiring, he wanted to enjoy the happiness of his family, but was informed that ten of his children and grandchildren died in the battlefield. He carried a coffin in anger and went to war, guarding 178 human fortresses! After Chen Wudi's blood energy was exhausted, he gained the strongest invincibility system. By killing monsters, he can gain blood energy points and improve his realm! And it can be resurrected infinitely! Enter the battlefield again and reach the top again! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.