Ah yes, Mother Nature sure loved to jest.
There, she showed off her gallant nature, creating all sorts of plains and terrains within the Dome of the Fierce.
It was precisely because of this that Landon decided to enclose mother's nature's treasure land into an insanely sturdy wall that has never been seen before.
If people think the Great wall of Baymard was thick and tall, then wait till you see the wall enclosing the Dome of the Fierce.
During that time, all sorts of monster attacks from the plants came down on the Baymardian soldiers and workers.
But did they relent?
Nope.
They traveled far to this region, and began work as fast as they could, defending against the creatures while also keeping a lid on the matter.
Understand that at that time, Baymard was only the size of its current Capital city.
So they had to sneak into Arcadina and do all this work, while keeping any visitors away.