Underworld: I Upgrade Infinitely

When the doomsday comes, everyone on the earth acquires a system, but the system will disappear after reaching level ten. However, the system obtained by Chen Mo will always exist. Others practice hard after level ten, and Chen Mo can upgrade by killing monsters. While others are still struggling to survive in the apocalypse, Chen Mo has become the legend of the night in this world. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.