Eliminate Singularities Starting from the Warring States Period in Japan!

Fantasy invades the real world [history] to form a singularity. If not dealt with, it will really lead to the destruction of the entire world! Japan's Warring States Period: [Undead Dragon Yin] invades, death is not rest but torture, the living dead are all over the island country, where is the real relief... Roman Empire: [Blessing of Suffering] has arrived. Believers can obtain blessings as long as they continue to torture themselves. Suffering makes the earth full of twisted and tortured blood... Christian Middle Ages: [Hell] came, the devil awakened with the help of the Crusades and tarnished the faith, and the remaining believers built the Holy Great Wall around Europe... Ming Dynasty of China: [Blood Infection], the infection spread from the Far East, the infected people unleashed their inner evil thoughts, and all living beings were in danger... ............. In 2100, Xia Nuo, who died, was reborn and returned to his middle school days. I originally wanted to take advantage of my rebirth to make up for my past regrets, but I found that things were not that simple. The young man held a long knife and stood silently on the mountain of corpses and sea of ​​blood, killing all the anomalies in the singularity! "The whole city is filled with mourning and blood. It's just a thought to save the common people!"