Well of the Dead

Well of the Dead is a wall boundary separating two of the floors controlled by Shalltear Bloodfallen in the Great Tomb of Nazarick.

Background
In the Web Novel, it is consider to be the wall that is situated in-between the 2nd and 3rd Floors of Nazarick. These two lanes happens to bear separation of both the 2nd Floor and 3rd Floor from sharing the same space, keeping them apart as opposing sides. With how it is structurally set up with these floors, this wall prevents people with the objective of easily crossing from one side of the floor they are in to reaching another floor or the latter way around whichever way they are coming at.

Layout & Features
Well of the Dead is a rounded hollowed depression with a diameter of 150 meters and 45 meters in depth. Above it was a crossing that is 15 meters wide, separated into two lanes.

Countless corpses were piled upon each other in numbers. They often ranged from the likes of decomposing corpses, drowned bodies, skeletons, to crushed corpses, and so on occasionally wriggling about. It would cause a mountain of entities to collapsed while new mountains were made through them based on how they tend to stack up one another over time.

In a way, this well was described as one of the spawnable places in Nazarick where the low-tier undead were born. There were none being born currently, but depending on if intruders of Nazarick depleted them, new weak undead would be given fake life.

Trivia

 * Only from the Web Novel, the name and features of Shalltear's controlled Floors of Nazarick were ever mentioned.
 * In the Web Novel, the vampirized Brain Unglaus who is a servant of Shalltear Bloodfallen has encountered the Well of the Dead while exploring and patrolling the layout of her floors.
 * A Death Knight summoned by Ainz Ooal Gown passed an area similar to the Well while delivering a message to Shalltear.