World Portal: A Post-Apocalyptic LitRPG Adventure

The World Portal is opening. Fresh off the defeat of the Daemon Baron ruling over the ruins of Buena Vista, David and the Rescuers must race to gather power to face their greatest threat yet. There is only six months until the World Portal opens sufficient to let a Daemon Emperor, a being beyond the power of the greatest of heroes, onto Earth. Can David grow strong enough to defeat the Daemon forces guarding it, or will Earth fall like so many other worlds have before it?