Spawn entity.DimDoors.Monolith.name is an item added by Dimensional Doors. It is a spawn egg for the Monolith. This does not have any formal name currently. The mob itself, called a Monolith, can be found in Limbo and the outside of Pocket Dungeons.. Limbo is found when the player dies while in a Pocket Dimension. Limbo is dark, and cannot be lit by torches. Monoliths are at first peaceful, but will become aggressive when near a player. They are immune to all damage, and upon attacking them, will teleport one to the spawn point of Limbo. Monoliths will disappear when touched by a block above them, or when shot with Explosive Bullets from the Hunter's Handgun.