If it's him, then he might indeed be able to accomplish that task...
"Fine, Your Excellency Dragon-Eagle." Gary Smith nodded, curiously asking, "Your state seems stable. You don't seem to be in a rush to select an heir..."
"You're right, with the help of the Ruby Sea, I might be able to hold on for another hundred years. I initially didn't plan on revealing myself so soon, as civilizations tend to grow stronger as they advance. But..." The Dragon-Eagle revealed a troubled, human-like expression and sighed, "You must have seen the murals. You should be aware of the sealed divine residue. It's seal has been weakening recently. I had no choice but to open the Secret Realm earlier..."
Gary Smith frowned, surprised to learn that the opening of the Secret Realm was due to the Divine Incarnation attempting to break free from its seal... as for its purpose...
Most probably, it wants the successor to deliver the message and strengthen the seal.