Reincarnated in the Apocalypse: Invincibility Starts From Killing Enemies With My Own Hands

[Decisive! Unstoppable! Feeling Good! No Mercy!]
As the dark day rose, a bloody rain fell from the sky, and a sudden mutation occurred between heaven and earth.
Any creature touched by the bloody rain underwent horrifying mutations, becoming bloodthirsty and cannibalistic. The Earth became a living hell!
The world instantly plunged into bloody chaos!
Five years after the mutation, Chu Xiu was reborn back to before it occurred.
In his previous life, he missed crucial opportunities and struggled for survival in the lower ranks.
After finally finding a chance to change his fate, it was discovered and taken by his enemy!
Furthermore, he was later crippled and devoured by monsters!
Now, returning through time, to survive and rise in this chaotic world, the first thing he must do was seize opportunities and eliminate his enemies!