Nosphaleen's father felt as though his mind had been shaken. All of a sudden, so many things made sense to him. Even little tidbits that he hadn't even considered in the past shook him to his core.
The Clypsians actually rose up during one of Earth's Ice Ages. They adapted to live in the water many generations after that, and they mostly had surviving these harsh conditions to thank.
So when Sylas said that they were trying to recreate a version of Earth here, he was actually referring to one of Earth's earliest periods. This entire planet, its existence, and the so-called Frostbane that dictated everything…
It was nothing more than a method of trying to recreate Earth.
This alone didn't seem to make sense. If recreating a world was so easy, then everyone would do it.
But the point here wasn't a recreation of Earth, but rather to use this as a canvas of sorts, an experimental hub to test and measure things—a trial run to see if their plans were working or not.