"
rise when I gave the word
Now in
Saying "seas would rise when I gave the word" is communicating the fact that he has an awful lot of power, as it says that he could do something that would take a Gargantua amount of power. This could be quite literal, like he actually can, but I highly doubt it. This is because it comes right after a sentence that informs you of the hefty amount of power that he holds. It's is all up to you if you want to believe me or not as this is all my point of view.