I! Use Viruses to Destroy and Save the World

Li Jun had a midnight snack and actually traveled to a world called Battle Star. When Li Jun fully understood this world, he began to despair. Just when Li Jun fell into despair, a voice sounded in Li Jun's mind. Ding.... The almighty virus system has been successfully activated, please start your journey to the end of the world. Ding.... Congratulations to the host for getting a copy of the T-q virus source Ding... Congratulations to the host for successfully wiping out a country, and will be rewarded with a source of the T-q evolved virus. Ding.... Congratulations to the host for successfully destroying and saving a world, reward the host... Next, how will Li Jun use the virus to destroy and save the world? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.