"We should not rely too heavily on the Box of Darkness; the gap between them is too large, and the Box of Darkness has already been corroded by the Dark Realm," Shard remarked, pointing out the traces...
Tifa pointed to the black stains on the brass gear mechanism box:
"This is the external manifestation of the corrosion. Fortunately, as long as the box isn't opened, the corrosive effects of the Dark Realm on it are almost negligible, so we can take it with us as a safety guarantee on our journey. But unless necessary, it's best not to let it spiral out of control, as that would accelerate the corrosion considerably."
"What would happen if the Box of Darkness really were corrupted by the Dark Realm?" Shard asked curiously. Tifa couldn't answer, but instead Luviya provided an answer:
