**Post-apocalyptic world**: A wasteland civilization after nuclear war. Some advanced technology remains, but society has collapsed, and mutated creatures dominate. Humanity clings to survival in fortress cities.
- **Cultivation world**: A xianxia universe with nine heavenly realms, each with a greater concentration of spiritual energy than the last. The upper three heavens are sealed off by a mysterious barrier, and cultivators cross between realms by shattering the void.
