The infinite races and races of the Multiverse has many different names for the Bottomless Abyss.
It could be known as the Demonic Realm, Hell, the Godforsaken Land or the Garden of Wastelands… Whatever the case may be, each name they give would never be free from negative connotations—apart from some races that had become utterly crazy. Even if most civilizations did not understand them, they would subconsciously reject anything that had to do with them.
For it was the grave of the Multiverse, the place where ashes of Flames extinguished accumulated.
The Bottomless Abyss was boundless, and the further the plane was below, the earlier its Flame had extinguished. Legends tell that the bottommost plane of the Abyss was the remains of the first world to have died, and the very first level of the Abyss.