After spending three days relocating the mountain range, Vandalieu continued making adjustments.

“Unlike the Boundary Mountain Range, the sky above the Ark Mountain Range isn’t a magical void, so it’s vulnerable to airborne enemies.”

The term "magical void" refers to an area of sky transformed into a hostile environment due to high concentrations of mana. In these regions, one might find clouds sturdy enough to walk on, islands made of compacted airborne dust, or entire atmospheres turned toxic. Changes in the environment are so extreme that even gravity might shift unpredictably, or spaces might warp into labyrinthine mazes without walls, making it perilous just to enter.

The creatures in these magical voids differ from those on the ground. They include bird-like monsters, dragon types such as wyverns, giants like Cloud Giants, gaseous beings such as mist-based Stalkers, clouds transformed into monstrous Gizmos, jellyfish-like monsters floating through the air, and even flying undead like skeletal creatures or zombies. These beings are often highly adapted to the environment, moving effortlessly through shifting gravitational fields.

For adventurers, navigating these areas is extremely dangerous. Just reaching the void is challenging due to the altitude, often several thousand meters high. Consequently, few adventurers dare to venture there, and the guild holds scant information about the void.

The world’s skies remain mostly free of magical voids because mana does not easily linger in the air, making the formation of such voids rare. Magical voids typically appear in places heavily saturated with mana, like the Demon Continent or the Devil’s Continent, where the land is so thoroughly contaminated that mana has nowhere else to escape.

The detachment of these high-altitude creatures from the ground means their movements rarely impact the surface. Thus, no nation dedicates significant resources to sending forces into the skies, leaving that task to a select few reckless adventurers driven by the allure of fame or danger.