In Heroic Creation Era, gods are undoubtedly the highest-level beings, existences that players cannot meet. The Light God governs the Divine Realm, the Demon God governs the Demon World, the Sea God governs the Sea Realm, and the Nether God governs the Netherworld. Then there's a whole mess of Minor Gods and Demigods with all sorts of roles. For players, encountering a Demigod is almost the limit.
But even for gods, there are some middle grounds that are difficult to control, such as the Nether Sea, which is the ocean within the Netherworld. The Nether God wants to control it but unfortunately has no knowledge of water. The Sea God wants to control it but unfortunately the death energy is too heavy and doesn't suit him.