When Micolash and the School of Mensis sought an audience with Mergo, they would likely never believe the events that would have transpired from it. The sacrifice of their own physical bodies was needed to project their minds into the realm of nightmares, but that sacrifice served their needs and bore its fruits.
This realm was hosted by none other than Micolash, and it was by his own design or want that the Nightmare of Mensis came to be.
The giant castle-like structure is divided into three very specific places.
- The Chapel where the Nightmare Apostles reside, at the left-most side of the whole structure;
- Mergo's Loft which houses the most important foes in the area, and is located on the right side;
- The Great Bridges that connect both buildings, the top and middle one containing gardens and the bottom one being simply a pathway. In the middle distance there is an enormous tower, where "something" gazes from afar, a giant spotlight that follows anything in its line of sight and induces Frenzy.
Lamps in the Area
- Lecture Building 2nd Floor (can only be used to enter the area)
- Brain of Mensis
- Carrion Crow (nightmare variant)
- Giant Lost Child
- Maneater Boar (nightmare variant)
- Mergo's Attendant
- Mergo's Chief Attendant
- Nightmare Apostle
- Rabid Dog (nightmare variant)
- Shadow of Yharnam
- Silverbeast (spawns two Parasite Larvae when killed by anything other than Fire or visceral attacks)
- Skeletal Puppet
- Winter Lantern
- Sprawled across the Nightmare there are countless statues that resemble human bodies melded together, and eyes that are sticking to every surface inside the buildings. Some of these eyes have spider like feet and a type of rod or plant erupting from the center of the pupil.
- The Nightmare of Mensis is amongst the most mysterious places in the world of Bloodborne, just like any other nightmare realm that can be found within it. However, taking into consideration that it resembles an enormous castle with an impressive library, many horrors and strange architecture, and that nightmares are based on reality of the world (in Bloodborne's world, specifically), this takes us to Micolash and his title as "Host of the Nightmare". Just like Gehrman he too is the host of a dream land, specifically a bad one, and as such the likely thing is that as Gehrman was granted audience with the Moon Presence, and given a home that was tied to his hopes and desires (the Abandoned Old Workshop), so did Micolash became the owner of this castle and its contents when he was granted audience with Mergo. However, it is unknown whether this is a structure that existed in the real world, or if it was conjured to fit the needs and wants of the despicable Micolash.
- The whole castle is named after two specific beings: Mergo and Mergo's Wet Nurse. This is interesting on many levels.