Global Invasion: I was hunted by the demons and became a god

One day, strange creatures invaded the city and killed the boy and the grandmother who depended on him, but the boy came back to life after dying… The difference is that now he is infinitely powerful. After that day, the teenager educates those who bullied him at school, and meanwhile, the strange creature that killed his grandma strikes again! The teenager crushed them one by one with uncontrollable strength and fierce vengeance. At this time, the boy covered in blood also looked like a monster…