The Dark is a very dangerous and desolate void, which contains many extreme forms of nothingness, sometimes even getting close to Absolute Nothing. This verse is also known as the "mainland" of the Barrel Container. This void is so empty that any object inside it decreases its Existence Rank by 1 every hour, eventually going so low into an existence rank that it is completely isolated from other structures.
That is, if it doesn't get erased within a Voidsecond.
The air, or lack of it, or really a lack of anything, is beyond freezing, clocking in at -ω^ω degrees.
Its properties, and the sheer size of this void, make it one of the most dangerous structures in The Box.
Many civilizations spent hundreds of OYC trying to escape this void, and most attempts ended in the death of the explorers. It wasn't until civilizations created wormhole technology advanced enough to pass this void that larger structures could be explored, allowing more powerful civilizations.