From his perspective, given the current situation, even if they managed to lure that Leviathan-class hero onto a nearby island or a small continent, it wouldn't really make a difference.
First off, with that kind of power, if the Leviathan wanted to leave, there'd be no stopping them. They simply didn't have the means to hold someone like that back.
Besides, this whole region was mostly ocean. Even if they were on land—be it an island or a small continent—it wouldn't matter much. With the strength of a Crimson Ultimate hero, the terrain wouldn't change the outcome. It'd probably end up just like before.
"Yeah, it's definitely not gonna be easy," Auremax said quietly. "We're talking about a Crimson Ultimate hero here—practically a demigod. And this one's already awakened a second time. But, my lord, when I say we need to change the natural environment, I don't mean tricking him onto land. I mean actually altering the environment itself."