Void

The Void is the gap of the Multiverse itself and a place that connects to all of the universes. Gaster was among those who was sent to the Void due to an accident involving one of his experiments and Bill Cipher ended up in the Void after being erased by Sans and Stanley Pines.

The Void is supposedly ruled by or perhaps being the 'body' of an entity known as the Shade Lord. It is said that the Shade Lord was responsible for dragging Gaster into the Void due to a mishap in his experiments as these very experiments most likely disturbed the Shade Lord from its slumber.

## Description

Over the course of the world's history, whenever a person, object, invention, game, claim, fashion style, prehistoric animal, or other miscellany that was considered a mistake to the world came into existence, it would be removed and erased from the real world and ends up in the Void. Sometimes when a person is sent to the Void, they seem to be frozen in time like a paused video, but one can break them out of it just by touch.

As seen with Gaster's case once something or someone is sent to the Void, all evidence that they ever existed is removed from the world—everyone's memory of the mistake is erased (unless a person wears a tinfoil hat), the mistake's image will all but vanish from any photos and pictures containing them, and where anything that belonged to the mistake (such as their photograph inside the secret lab) was located, the world will just fold up over them to hide and get rid of them. The only place found that has an ability to connect and transmit things to and from the Void is a grey doorway that very rarely appears in the most random of places. Given that it is rare, it is extremely difficult to find even for one as advanced as the Doctor for according to him, the door is out of sync with all time.

He also states that the Void contained no light or darkness. It also featured no temporal or spatial dimensions (neither "up" nor "down"), but the Tenth Doctor used some spatial language to conceptualise how the Void was "in between" all the universes which were "stacked up against each other". Even time in most senses did not actually exist there. Anyone who entered the Void could choose to let eternity pass them by: they would "exist outside the whole of creation" and would be completely unaffected by events as major as the end of their home universe or the start of another.

## Overview

In the far distant past, the Void was worshipped as a god by the ancient denizens that existed before the arrival of the Pale King and the foundation of Hallownest as a whole. Due to unknown circumstances, this civilization disappeared.

Sometime after the Pale King arrived in Hallownest, he discovered the Void in the Abyss. He built a lighthouse on top of a natural spire near the sea of Void which was used to suppress the Void. Seeing the seemingly immeasurable potential of the Void, the Pale King sought to weaponize it in order to use it against his enemies. He did this by having to create constructs that are able to house Void within them, but each Vessel proved too weak. It was not until the Pale King attempted to infuse a soul within the Vessel to have it properly contain the Void that things started to go both well and awry.

During his experimentation of how to destroy the barrier using soul power, the machinery that housed the many souls of deceased children let out a pulse so strong it stirred the Void from its slumber and made it lash out aggressively. This not only rendered the kingdom of Hallownest to ruin but also drag Gaster into the Void. In the end, he was sent hurtling into the Void and became a nonexistent singularity. Bill Cipher ended up in the Void following his defeat the hands of the Mystery Kids, most notably Stan and Sans, and was scattered into many pieces unable to put himself back together. It was not until the Axolotl appeared to give Bill a second chance to redeem himself.

## The City

The main "metropolitan" area of the Void. The City's only permanent residence are Voidlings, as all other inhabitants of the Void are considered "outsiders", and are forbidden from settling down within The City. According to the Eleventh Doctor the city is approximately 7 times larger than the Solar System.