You're the owner of a realm

The outside world's barriers have fallen; the darkness invades and has led the world to be a barren wasteland of struggle, with few surviving cities. Expedition teams must travel beyond the walls and barriers in search of salvation or resources to sustain themselves, often retreating to the realm of magic for safety. But, they stumble upon an old gate, one that leads to your realm, an impossibly large realm even by gods' standards. Will you let them in and help them? Updated with Innerself!