In 2028, the R7 virus broke out in full force.
All infected organisms have mutated in different tendencies.
Or become a powerful Ertz who can manipulate natural elements.
Or it can become a war tooth that evolves rapidly and has amazing resilience.
Or become a person without wisdom but with secondary mutation.
The surviving humans gradually gathered and guarded the "Xicheng", the last pure land in the end of the world.
With their awakened special abilities, humans began to recharge their batteries and prepare for a desperate counterattack.
Ps: Various settings of the article may be slightly changed later.