Transmigrate to Another World: Only Killing Can Keep You Alive

[Decisive and ruthless + bloodthirsty and brutal + evolution and mutation + becoming a demon] My name is Xu An. I transmigrated to another world. It was something to celebrate, and the whole school was “celebrating.” After all, this might be their chance to fulfill their dream of marrying a monster girl and setting off on a fantastic adventure. But one deadly struggle after another dragged Xu An out of his pleasant fantasies. In this terrifying, unknown world, killing brings power. With ghosts, monsters, and natural disasters appearing without end, he realized that survival meant fighting to the bitter end! And so the slaughter began! With the blood of all things, I consecrate the throne of my skull!