Silva had long outgrown Argon, though this fact was hidden. Ophelia hid it. Long ago, when the seventh continent was about to fall to the same fate that the others had fallen to, Ophelia had a plan.
She wanted to craft something different—yes, not entirely different—in order to trick Order. She decided to make something that would seem the same yet vastly different.
The first phase of her plan was the SSS legacy. Only she and Silva knew about that legacy, but in reality, that legacy was not the power of the first dark dragon like she had given to the others that had come before Silva. No, she changed something.
The legacy Silva gained was one modified in secret. Ophelia changed the structure. It carried not just the power of the first dark dragon, but she also took his essence, his memories, and everything that was him.