After my sister died, I fought my way through the underworld to seek revenge!

Li Mu traveled to a parallel world where all races invaded.
At that time, the human race was oppressed in various ways, and the Blue Star was filled with grief and suffering.
There is no rise of heroes, only endless darkness.
Fortunately, Li Mu awakened the Killing God System. As long as he kills, he can become infinitely stronger!
An eye for an eye, blood for blood, revenge and slaughter the heavens!
He is even hailed by countless people as a future star! A hero of the human race!
However, some people want to execute him, a human hero, for ridiculous purposes.
But they promised that he would be buried as a hero after his death, and all his privileges and preferential treatment would be given to his sister!
His sister is his only relative, and also his only weakness!
So, Li Mu agreed...
However, he never expected that after his death, he would go to the underworld and be imprisoned in the deepest part of the hell!
However, he didn't care. He could endure both torture and loneliness...
Until one day, the ghost came to him with his sister who was only a soul and a spirit left...
Li Mu clenched the knife tightly, trembling all over...
He knew it was time for him to leave hell!