Kill Gao Wu! My Attack Will Permanently Increase Qi and Blood!

[High martial arts + refreshing writing + crushing + fast pace + decisive killing] The eighth-level monster arrives and human civilization is destroyed overnight. In front of the Golden City, Ning Yuan defended the city alone and fought until he was killed! On the eve of his death in battle, the system was activated, and Ning Yuan was reborn and returned to the time when he first started practicing martial arts. In this life, he activated the heaven-defying system—attacking can increase Qi and blood! Hit someone, health +1! Kill the monster, gain +10 energy and blood! Kill the demon king and gain +10,000 energy and blood! It took others three years of hard training to break through one realm, but he broke through three realms in three days! When the strongest human being was still struggling to support himself in the Martial Emperor realm, he was already flying in the air, overlooking all living beings. In the last life, the sky-swallowing python destroyed the world and humans fell to their knees. In this life, Ning Yuan is reborn and starts from scratch! "Demon King? Demon Emperor? Demon Saint?" "I'm in a hurry, so come on together!"