Heaven and Earth couldn't touch the metal, so someone had to handle the fusion with the dragon. Yet, Sepunia had no memories about the island in the void, and her companions could guess that the same applied to most cultivators in the rulers' system.
That left only one option open. Heaven and Earth must have relied on one or more of the privileged cultivators for the task.
King Elbas had already confirmed that Divine Architect had nothing to do with the experiment. His evaluation could be wrong, but Noah trusted his instincts enough to remove that solid stage cultivator from his worries.
The island was self-sufficient. Heaven and Earth filled it with light when it was about to exhaust its energy, but it didn't need maintenance or similar processes. In theory, it didn't need a guardian, but Noah believed that the rulers wouldn't leave such a secretive place without multiple types of protections.
