[No system + urban superpowers + alien invasion + single female protagonist (no female protagonist?)]
After a vision of heaven and earth, monsters came to the world, and a unique monster lived in the protagonist's body, and the two reached a win-win deal.
One person and one demon, he wants to kill the demon, and it wants to eat the demon. They complement each other, and the protagonist has reached the top.
Join the demon clan and kill the demon king. Who dares to be the king in heaven and earth?
