The Abyss

The Abyss is an infinite void surrounding the Omniverse.

As the Omniverse contains everything that "exists", The Abyss exists in a higher Existence State (Existence State 2) and thus does not interact with the Omniverse (that has an Existence State of 1).

Attempting to exit the Omniverse into The Abyss without changing your Existence State to the same one as The Abyss will glitch you out of reality, instantly killing you and warping you to Unexistence. Because of this, almost all of the creatures in the Omniverse believe that the Omniverse is the last container (although a few civilizations such as The Hugghiguyughiyuguhi have successfully ventured into The Abyss).

The Abyss is surrounded by a verse with an Existence State of 3 (one higher than The Abyss' Existence State and 2 states higher than the Omniverse's Existence State). This verse is then surrounded by a verse that has an Existence State of 4, which is surrounded by a verse with an Existence State of 5, etc. This goes on to infinity, and the infinite chain will eventually reach Reality (the container of virtually all positive Existence States), which has an Existence State of Infinity.