Void

The Void is an inky-black substance that is known to exist in The Abyss. It plays a major role throughout the history of the Kingdom of Hallownest.

The Void was used by the Pale King in many attempts to create constructs. A room within the White Palace houses moulds for these creations as well as their shells seen on Kingsmoulds and Wingmoulds. The Collector, due to some of its resemblance to Kingsmoulds, may have also been a creation by the Pale King.

The King produced and created numerous Vessels in an attempt to seal away the Old Light, the Radiance. However most of these were dubbed failures, and were cast into the Abyss.

It is possible that the shell of each Vessel plays a part in sealing the Void, based on the fact that when the player dies, their shell breaks and their Shade is let loose. As well, another reason that could separate the shell from the Shade is that when the Knight loses their Shade, they both seem to have distinct wills with the Shade even attacking the Knight. The Shade also bears resemblance to the Siblings found within the Abyss which are stated to be the "fragment of a lingering will". This most likely makes the Siblings the shades from many of the discarded shells within the Abyss.

Large towers were constructed in the Abyss, reminiscent of lighthouses, that used light to repel the dark Void.

After many rounds of trial and error, finally, a Vessel was selected to seal away the Radiance and the entrance to the Abyss was sealed with the mark of the King, stating that "we shall enter that place no longer."

Void Beings

 * Void Tendrils - Possibly a natural formation of the Void itself, as there is no mould for it but rather only an imprint found engraved into rock.
 * Kingsmoulds - Constructed along with the Wingmoulds in the King's workshop as guards.
 * Wingmoulds - Constructed along with the Kingsmoulds in the King's workshop. Unknown how the shape was created, although several pieces of their armour are found hanging from the ceiling.
 * Siblings - All that remains of the Vessels that were deemed to be not pure enough to seal away the Radiance.
 * (Possible) The Collector - Powerful void being that resides in the Tower of Love. Responsible for the capture of the captive grubs.
 * The Hollow Knight - The Vessel deemed "pure" by The Pale King, it was taken out of  The Abyss to be trained and then eventually contain The Radiance .
 * Pure Vessel - Name given to The Hollow Knight while it was at its prime. Likely sealed into the Temple of the Black Egg shortly after along with The Radiance. Although the name given labels The Hollow Knight as "pure" it is likely not literal as many other sources suggest otherwise.
 * The Knight - The Vessel the player controls throughout the game.
 * Void given Focus - Also known as "Shade Lord" in the game files, a colossal being of pure Void Energy. Referred to as "God of gods" by The Godseeker.

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