"That's a region where large ships can't navigate at all. Just beneath the sea surface, tangled plants intertwine like a dense web.
"Small boats carrying too many people sometimes struggle to glide smoothly. In most places, people can even walk on the plants.
"But those tangled plants have holes in some places. A careless step could lead to falling into an endless abyss. The surrounding plants will entangle you, making it impossible to climb back up."
Hearing this description, Jason nodded. He probably understood, though he still couldn't quite imagine it.
Alka sat in a corner of the Great Cathedral Library, quietly flipping through the book in her hands. She read:
""It is a vast sea region completely occupied by greenery. From afar, a green line can be seen on the horizon. While sailing past, it often feels as if one is navigating along the edge of a prairie."
