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. This lane happens to separate both the 2nd Floor and 3rd Floor from sharing the same space, keeping them apart as opposing sides. With how these two lanes are set up with these floors, it prevents people from easily crossing from one side in that floor to reaching another floor or the latter way around.

Layout & Features
Well of the Dead is a rounded hollowed depression with a diameter of 150 metres and 45 metres in depth. Above it was a crossing that is 15 metres 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 was ever mentioned.
 * In the Web Novel, the vampirized Brain Unglaus who is a servant of Shalltear Bloodfallen has encounter the Well of the Dead while exploring and patrolling the layout of her floors.