Hollow Knight - The Abyss

The Abyss - The Abyss is the lowest area in Hallownest, located below Ancient Basin. It is the place of origin of the Void, a substance found at the bottom of the Abyss.

Before the kingdom of Hallownest was founded, an ancient civilisation originated from or near the Abyss who worshipped the Void. When the Pale King arrived in Hallownest, he eventually discovered the Abyss and the presence of the Void. He used the Void to turn his children into Vessels, beings with a shell filled with Void who were born in the Abyss. The Pale King sealed the Abyss after selecting the Hollow Knight as his chosen Vessel. The shades of dead Vessels, the Siblings, still wander the bottom of the Abyss.