Great Tomb of Nazarick

Great Tomb of Nazarick (ナザリック 地下大墳墓) is the guild headquarters of Ainz Ooal Gown, widely renowned for being an unconquerable dungeon throughout YGGDRASIL.

Background
Before Ainz Ooal Gown conquered this guild-based dungeon, it was a dungeon that was recommended for level 80+ players to beat in one attempt.

The existence of the Great Tomb of Nazarick came to the attention of Nishikienrai, who reported to his Nine's Own Goal. After the clan reorganized itself as Ainz Ooal Gown, the guild then launched a raid on the unexplored dungeon. The guild was able to swiftly defeat each of the Five Rulers and eventually make their way to the sixth floor after battling numerous undead.

Upon completing this dungeon successfully in their first try, they were given the World Item, "The Throne of Kings" for the guild master to sit on. According to Tabula Smaragdina, the Great Tomb of Nazarick seems to be identify as a simultaneous attack dungeon, stating it to be the hardest kind, the sort that needs five parties to progress. Back in YGGDRASIL, the dungeon is originally located in the deepest reaches of the huge poison swamp or rather in the marshes of Helheim. But after the dungeon was transported into the New World however, it is now situated within the grassland near the Great Forest of Tob.

Additionally, the Great Tomb of Nazarick is said to be one of the most feared and legendary dungeons of YGGDRASIL. As Ainz Ooal Gown acted the role of an "evil" guild, there were many invaders who attempts to try and capture the dungeon, but all of them were repelled without exception. The only attack that ever reached above the 6th Floor was an alliance comprising of eight guilds and mercenary NPCs. They numbered with about fifteen hundred people united together against the dungeon. Despite the invasion from a guild alliance with their combined strength, it was still not enough for these invaders to even successfully conquer the 8th Floor as they were stopped halfway by Victim and the NPCs inhabiting there.

The Undead King Arc
When YGGDRASIL was about to be shut down, Momonga would continue to stayed online in the game at the Great Tomb of Nazarick until the very end. This was when right after the majority of his fellow guild mates have left for personal reasons in real life and braced himself to be forcefully logged out. However, he didn't expected himself to be teleported to the New World along with his guild headquarters and all of his NPC minions, who were there with him and now have sentient personalities based off of their programmed setting.

Deciding to make an everlasting name for not only himself in the New World, Momonga takes on the mantle, Ainz Ooal Gown as it represents his whole guild altogether.

The Dark Warrior Arc
Ainz orders all of his NPC servants to infiltrate and gather any intelligence they can stumbled upon during their search for any possible players near the surrounding of Nazarick. He decides to learn more about this New World. As Ainz is unfamiliar with the New World, he decided to go on adventuring outside the Great Tomb of Nazarick. Ainz carry out his some personal exploration with Narberal Gamma who accompany him along the way on his journey as they both adopted an adventurer persona in E-Rantel.

The Bloody Valkyrie Arc
Nazarick had a rude awakening when Shalltear Bloodfallen had fallen victim of a mind-control ability. Such a scenario should have been impossible to happen to a Floor Guardian, but it revealed a terrifying existence that could potentially threaten Nazarick or even destroy it. As a result, Ainz has decided to equip his Floor Guardians with World Items for the sake of protections against the enemy.

The Show Must Go On! Arc
Nazarick hosted its first theatre production, Romeo and Juliet. Audtions were held for the role of Juliet, though many of the NPCs in Nazarick refrained from entering as they did not want to earn the ire of Albedo and Shalltear who were competing for the role.

The Lizard Man Heroes Arc
Ainz orders the annihilation of the lizardmen to create stronger undead and thus strengthen Nazarick. The undead army of Nazarick were utterly defeated by the lizardmen, but it was just an experiment to use that weak army for observing how the lizardman fight. Ainz and the Nazarick forces threaten the lizardmen and challenge them to fight Cocytus. After the lizardmen heroes are defeated, Ainz then revived the strongest lizardmen and all the lizardmen tribes bow down to their new God.

The Men in the Kingdom Arc
The forces of Nazarick infiltrated the Re-Estize Kingdom's underground criminal organization, Eight Fingers. By controlling the Eight Fingers's executives, Ainz Ooal Gown was able to obtain its own intelligence network. Through them, they are able to gain a broader understanding on the political activities between the Re-Estize Kingdom and Baharuth Empire.

The Invaders of the Large Tomb Arc
Upon settling into the New World, Ainz began to make Nazarick his own seat of power. In addition, Nazarick has since move on to becoming an independent nation, operating from within the territory of Re-Estize Kingdom. Nazarick was invaded by workers of the Baharuth Empire. They immediately disposed of them and retaliated for the invasion.

The Magic Caster of Destroy Arc
The Great Tomb of Nazarick was visited by the delegation from the Baharuth Empire. The imperial delegation, especially Emperor Jircniv Rune Farlord El Nix, were in awe at the wealth and grandeur of the ninth and tenth floors.

Features and Layout
Prior to Ainz Ooal Gown conquering this dungeon, the Great Tomb of Nazarick was originally set to have only six floors. After Ainz Ooal Gown conquered it, the dungeon was completely reconstructed and was stretched to over ten floors. For travel between floors, there are specific points on each floor, where gates open to allow magical transit.

Initially, the max data storage for making Custom NPCs was 2250, but since the dungeon was won by Ainz Ooal Gown on its first try, they were granted additional data levels of 500. This setup allows the guild to make up a grand total of 2750 levels of Custom NPCs at most. Thus, Nazarick is considered to be almost on par with the other nine dungeons in YGGDRASIL, that offer 3000 level data storage for NPCs.

In the Web Novel, the characteristics of the undead that spawn here in Nazarick can heal by negative damage, and get damaged by positive energy. They are also unaffected by instant death attacks and mental attacks as well. It is a strategy that takes advantage of the undead's racial traits. The negative damage spread across the floors by about 1 point and reduces the area effects on positive energy while still allowing recovery magic. Additionally, there was a transportation trap system that could divide a party. That wasn’t the only trap as there were many other types strung up all over the place. Traps that blinded people and ones that poisoned the air, all for the sake of blocking the path of the adventurers.

All the enemies were comprised solely of undead in Nazarick, but it still was not easy to cope with them. Coupled with the typical undead of zombies and skeletons, original monsters could be used and is one of the major factors of the invaders' crushing defeat. As well as elementals, demons, and devils appearing more frequently than let alone Summoned Monsters. Summoned Monsters could be specifically chosen to be disadvantageous to the opponent. In a nutshell, one could choose those with fatal special abilities. Naturally, the deeper the invaders went into the floors, much more difficult monsters would appear. It was a wall of monsters so thick that one could not even imagine how much resources were spent for Nazarick.

On the other hand, repairing damage to the Great Tomb of Nazarick requires the payment of a fee. However, one can repair a certain sum's worth of damage every day for no charge. In particular, the upper floors were designed to be particularly cheap given the fact that intruders often attempted to invade, so even repairing the entire floor is not a great expense. In contrast, things on the 9th Floor are look upon as quite expensive according to Ainz. Still, items within the royal suites are usually expensive anyways. Nazarick was warded to block teleportation magic into or within itself except for a few specific areas.

Surface
About 200 meters in diameter, 6-meter-high walls surround the tomb. Four affiliated tombs are located in the four cardinal directions. At their center, the largest tomb exists with an entrance into the underground tomb. This central tomb is the upper-most level that one can teleport to by using a Ring of Ainz Ooal Gown.

1st~3rd Floor: Grave
These floors is the Catacombs. They consist of the subterranean burial chambers where several dozen undead are wandering around in the darkness.
 * Floor Guardian: Shalltear Bloodfallen
 * Known Areas
 * Black Capsule: Residence of Kyouhukou. Located on the 2nd Floor.
 * Derelict Rope Bridge: It is held up by ropes that looked like they were about to break. The boards below his feet were rotten through, and where some knots had come loose, the planks had fallen off, leaving nothing, but empty space where they should have been. Below the bridge were the silhouettes of countless corpses.
 * Grave Vault of Adipocere: The place where Shalltear resides in. Located on the 2nd Floor.
 * Windowless Underground Chapel: The chapel is about a hundred meters across and completely unlit.

4th Floor: Underground Lake
This floor is an underground lake contained with a cavern. In the past, before Ainz Ooal Gown's conquest of the tomb, the boss of this floor was a giant white bat.
 * Floor Guardian: Gargantua

5th Floor: Glacier
This floor is a wide area filled with numerous icebergs. Weather phenomena including cloud and snow are present here. There used to be an area penalty that caused slow and gave ice-type damage, but it was turned off to save costs on maintenance after the teleportation.
 * Floor Guardian: Cocytus
 * Known Areas
 * Frozen Prison: A two-story building that looks similar to the house of fairy tales, though it is frozen on the surface, making its appearance bleak. Captured enemies of Nazarick are locked here, guarded by Wraith-type undead monsters.
 * Room of Truth: Neuronist Painkill's room.
 * Room of Nigredo: Nigredo's room. One should get a baby doll from the entrance and give it to Nigredo to calm her down before starting conversation.
 * Snowball Earth: Cocytus' residence. It is a white dome looking similar to an overturned vespiary. Six large crystals surround this structure, which are residences of Frost Virgins (level 82).

6th Floor: Jungle
This floor is about 200 meters in height. Created by Blue Planet, a fake sky exists on the ceiling, reproducing the day and night cycle that changes according to the time of day. There is no weather except wind in this area, so Mare occasionally summons rain.
 * Floor Guardian: Aura Bella Fiora and Mare Bello Fiore
 * Known Areas
 * Gigantic Tree: Aura and Mare's residence.
 * Amphitheatrum: Built as a copy of the Roman Colosseum. Golems act as the audience, while VIP seats are prepared for guild members. Dragonkins (level 55) work as cleaners.
 * Green Hole: An area that was developed into a village after the conquest of the Great Forest of Tob. Dryads, treants, spear needles and some lizardmen live in the village, raising mandrakes, apples, etc.

7th Floor: Lava
This floor is a crimson lava flowed like river, with numerous bubbles in these currents bursting as they reached the surface. This place, which was thoroughly inimical to the living, perfectly fitted the description of a "hell world". In the past, before Ainz Ooal Gown's conquest of the tomb, the boss of this floor was a fire dragon.

According to Demiurge, this dominion was designed and created for him by Ulbert Alain Odle, so it contains everything he needs to perform his function.
 * Floor Guardian: Demiurge
 * Known Areas
 * Blazing Temple: Demiurge's residence. The entrance to the 8th Floor is inside the temple. Seven Evil Lords (around level 80) guard this area.
 * River of Lava: An area guarded by Guren.

8th Floor: Wilderness
This floor is Nazarick's final defense line, guarded by the most powerful NPCs. Capture of the 8th Floor means that Ainz Ooal Gown's chances of victory is low. This floor seems to be dangerous even to the NPCs of Nazarick as Ainz forbade them from entering the 8th Floor; at least one World Item exists here.
 * Floor Guardian: Victim
 * Known Areas
 * Sephiroth: Victim's residence.
 * Cherry Blossom Sanctuary: Aureole Omega's residence. The Uka-no-Mitama and Ootoshi guard this area.

9th Floor: Royal Suite
This floor contains Guild Members' and NPCs' rooms. It also included imitations of large communal baths, cafeterias, beauty salons, clothing stores, grocery stores, fitness salons, nail salons and numerous other types of facility rooms. These facilities were just for decoration in YGGDRASIL, but they became real after the base's arrival in the New World.
 * Known Areas
 * Round Table: Conference chamber of the Forty-One Supreme Beings.
 * Bar: Managed by the Sous-chef.
 * Spa Resort Nazarick: Largely public, it has a total of seventeen baths with nine types for the two genders. It is a bath, which was made up of twelve zones in total. These zones would include the largest jungle bath, a traditional looking roman bath, a yuzu bath with yuzus floating on it, a carbonated bath, a jacuzzi, an electric bath with low current that electrified the body, a cold bath with charcoals floating on it, the Cherenkov pool, a mixed open air bath with an artificial scenery, a sauna, a bedrock bath, and finally, the lounge.
 * Staff Canteen: A white-washed canteen area, where the maids of Nazarick gather for meals.
 * Manicure Salon

10th Floor: Throne
This floor is where the throne in which the guild master Momonga sits on. The throne is a World Item better known as "The Throne of Kings".
 * Floor Guardian: Albedo
 * Known Areas
 * Room of the Pleiades Six Stars: Located right after the entrance of the 10th floor.
 * Clavicula Salomonis: 67 Golems (inspired from the Spirits of Solomon) and elemental traps exist in the hall.
 * Throne Hall: Albedo's original residence. Two World Items exist in this hall, including Albedo's "True Nought, Ginnungagap". This great hall also contained many high-leveled vassals who had been hand-picked by the other Floor Guardians.
 * Ashurbanipal: This library is the residence of Titus Annaeus Secundus. Here is where Ainz Ooal Gown, stores book-shaped items along with normal books. Magic scrolls are also manufactured in this area. It is guarded by five overlord (over level 75), whose names are based on the Five Good Emperors of Roman Empire (Cocceius, Ulpius, Aelius, Fulvius and Aurelius).

Treasury
This place is spatially isolated from other areas, so a Ring of Ainz Ooal Gown is necessary to enter the Treasury. On the other hand, the air in the Treasury is toxic and thus, anyone without poison immunity or items granting it will die within three steps.
 * Area Guardian: Pandora's Actor
 * Known Areas
 * Chief Manager's Room: The place where Pandora's Actor resides in.
 * Mausoleum: The vault which holds the World Items. It is also a resting place for Ainz's former guild members. Guarded by 37 golems named Avatara. If one enters the mausoleum with a Ring of Ainz Ooal Gown equipped, the Avataras will attack that person.

Systems
As a dungeon, the Great Tomb of Nazarick has numerous systems incorporated in its data that regulates its maintenance and defense.

Administration System: In order to gain access to this system, it requires Ainz saying the key words which are "Master Source — Open". It recorded the daily maintenance costs, the numbers and types of vassals or NPCs present, all sorts of magical traps and gimmicks and so on. In other words, it can record the names of all the NPCs made by the guild members. One could exert large-scale control over them all from here. If it could still function like in YGGDRASIL, one could access this system from anywhere. However, after some experimentation, Ainz found out that in the New World, the system could only be operated from the heart of the dungeon, the Throne Room. Additionally, the system is also capable of verifying an NPC's current allegiance. Defense System: The Great Tomb of Nazarick has a defense system managed by Albedo, so to keep the invaders occupied upon entering the various floors from within inside the tomb's domain itself. If Ainz did gave Albedo the command to do so, she can even use booby traps that cost money. This would include spraying poisonous gas or create sudden floods of undead. Avoiding the use of money to activate traps however, Albedo can instead used the defense system for POPs and traps with serfs.

Mercenary System: Otherwise, it is also known as the automatic spawn system. This system would only produce monsters that were level 30 at most. They were the POPs, in other words, monsters that are automatically spawned by it from within YGGDRASIL. On the other hand, there are other types of monsters much higher in level than 30 alone which can also be summoned, but done so through YGGDRASIL's gold coins. For instance, Hanzo being a level 80 can be summoned along with Lip Bug or even Greater Doppelgängers. Ainz states that the Mercenary NPCs have poor management of aggro. According to Ainz, the high-level vassals that the Floor Guardians had brought along were beings created through YGGDRASIL’s mercenary system and required expenditures of in-game currency or real money. The former could be created again for free if they were destroyed, but the money spent on the latter would be wasted if they died.

Ariadne System: Back then during YGGDRASIL, this system can only be triggered if the invaders were to be locked up. It was a system that checks the validity of a created base. However, there was no guarantee that whether or not this rule still applied in the New World. In order to stop one from creating such an invincible fortress, it was a reason of why Ariadne surveillance system existed for this sole purpose. Other things Ariadne inspected were the distance one could travel inside, how many doors there were and various other rules on base construction that were set in detail. Dungeons that violated the rules would be flagged by the YGGDRASIL system and fined. As a result, the guild funds would be deducted gradually at a visible rate. For Nazarick, however, such problems were already solved by the 5th and 6th levels due to the guild having to pay a lot to widen the dungeon, so it can be maintained this long until now.

Patrol System: Albedo had designed this system with the purpose of deliberately leaving gaps in the surface patrol routes to create opportunities suitable for invasion. This was because it had been considered that the enemy would immediately pounce on any weaknesses in the security system once they were found and draw up plans designed to capitalize on them. However, any such gaps in Nazarick’s patrols were under remote observation, which meant that there was no actual weakness. This was a strategy to make the enemy think they had exploited a vulnerability and thus, lure them into a trap.

Circular Notice System: It is a courier message system devised and created by the ruler of the Great Tomb of Nazarick, Ainz Ooal Gown, himself. The function of this memo folder would accessibly allow Floor Guardians to be able to write down non-urgent messages and communicate with each other. However, there was no other system similar to its existence until now.

Trivia

 * "Underground Large Grave of Nazarick" is the official English name, following the Picture in Volume 1.
 * Nazarick was originally located in Helheim, a cloudy, dark cold world without daylight.
 * Ainz and Shalltear were the ones who handled lone intruders whenever they invaded the Great Tomb of Nazarick.
 * According to Ainz, operating environmental effects in the Great Tomb of Nazarick required money to do so, so it had been left deactivated.
 * Jircniv calls the Great Tomb of Nazarick as a "Demon King's Castle", because of the multiple non-human and demi-human races that reside there.
 * As for Guardians, the Tomb had a limited data quota available for it's customization. Nazarick players could buy cash items to expand the amount of data.
 * The workers whom explored the Great Tomb of Nazarick structurally and functionally said that it is close to a relic of an ancient past comparable to the era of the Eight Greed Kings 500 years ago.
 * Anyone who wanted to go outside the Great Tomb of Nazarick would need to be accompanied by at least five level 75 servants or higher.
 * In the Web Novel, out of 1500 comprises of players and mercenary NPCs that invaded the dungeon, there were only about 1000 to 1200 who successfully managed to reach the 8th Floor.

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