Aster narrowed his eyes, looking at the mana flow within his view. The mana density varies from above to below, almost as if the massless mana is "heavier than air" for some reason.
"This can only be that, right?" Aster whispered, his lips puckered into a frown. "... Some sort of mana-made gas—probably a poison of some sort."
Mana is present in the air, but seeing the difference in density between high and low positions, there was obviously "something" that was heavier than the air below. Of course, there's a chance that it wasn't poison, but thinking of the worst possibility made Aster unable to go down.
"..."
Right then, Aster began to think. Can he move through the maze without reaching the ground? The answer... was something he had already done earlier.
"Wall run...!"
