Ghost Force

"Reporting to humans, we have discovered that there are indeed ghosts in this world. They are an ancient ethnic group and a force. They are mysterious and dangerous." "According to investigations, ghost forces have been spreading and infiltrating among human groups since ancient times. We don't know their purpose, but we know how powerful and terrifying they are." "So, we started a war with ghost forces, a dispute without gunpowder but far more terrifying." "Ghost forces are everywhere. They hide in the crowd and wait for opportunities. So, find out the ghosts around you and kill them!"