The Absolute's Dwelling

I awakened the ultimate power: absolute control over my own home. No monster, demon, or god can enter without my permission. In a world overrun by apocalyptic dungeons, this should make me the safest man alive. But my perfect shelter is also a gilded cage, bound by one infuriating rule. The system declared I can never step outside. As humanity crumbles, how does a man build an empire without ever leaving his front door?