I Am Invincible From the End of the World

Novel Summary
[Invincible Shuangwen] The end times 200 years later.
Lin Xinghai obtained the system, ran rampant in the apocalypse, and crushed all enemies.
Rolling is cool for a while, and rolling has been cool all the time.
Ding! Gain blood power +1
Ding! Gain Genetic Optimization +1%
Ding! Gain firearms skill proficiency.
PS: The creativity comes from the spirit cage.
– Description from readMTL