Since those first-circle wizard organizations were able to pass through smoothly, it meant that most of the sea beasts were below the first circle. They would not pose any danger to him. Even if a second-circle sea beast appeared, the Tower Master and the others would be there to take care of it.
If that didn't work, Levi would escape with Leviathan when the organization was in danger of being destroyed. If Ms. Marlene and the Tower Master were willing to go with him, he would sneak back to the human world with them. By then, he might even be able to reimburse the ticket to the sub-dimensional portal.
When they arrived in the human world, they would hide for a period of time before returning after the sea beast tide passed.
In short, they fled back to the human world.
From the description of the announcement, this sea beast tide was no small matter.
It was actually the strongest level 3 beast tide in 2,000 years.
