One of Ainz's favorite summons.
- Elite Mook: These things are no pushovers. A single Death Knight can eliminate an army in one fell swoop, as observed with the Carne Village incident.
- Lightning Bruiser: While statistically serving as a Stone Wall, they're this from the perspective of New Worlders. Level 25 offensive abilities in a world where 30 is considered legendary is more than enough for them to reduce nearly anything to a bloody smear from one attack, they can move with surprising speed considering their size, and are virtually indestructible even to the strongest of beings.
- Mundane Utility: As a show of power, Ainz had a dozen of these terrible monsters serving as his wait staff while having the Baharuth Emperor visit Nazarick.
- Stone Wall: By YGGDRASIL standards, their defense is comparable to a level 40 being while their offensive abilities are around 25. Keep in mind that this by YGGDRASIL standards.
- Terrifying Rescuer: Justified. The first Death Knight created by Ainz was ordered to eliminate the Slane Theocracy knights. As it was ordered to kill those knights specifically, it's very understandable for the surviving Carne villagers to be terrified of it. They somewhat got over it after they met Ainz.
Eight-Edge AssassinInsectoid monsters who serve as guards in Nazarick. They are capable of invisibility and specialize in ambush attacks.
- Adaptational Species Change: The Light Novel describes these creatures as humanoid ninjas with eight limbs. The anime does away with both the "humanoid" and the "ninja" side of things, making them look like regular Giant Spiders with an ant-like body shape and Glowing Eyes of Doom.
- Big Creepy-Crawlies: Giant anthropods, at least in the anime version.
- Giant Spider: In the anime, though the light novel describes them as humanoid.
- Invisibility: They use this power to ambush intruders and kill them by surprise in a single attack.
- Visible Invisibility: How they're depicted in the anime.
- Multi-Armed and Dangerous: In the light novel, they are humanoid monsters with spider limbs capable of making eight attacks simultaneously.
Monsters that act as private guards for people outside of Nazarick.
Nazarick Old/Elder/Master GuarderElite skeletons with enchanted armor and weapons that defend Nazarick. Old Guarders are the weakest, followed by Elder and Master Guarders.
- Curb-Stomp Battle: Green Leaf didn't stand much of a chance against a group of Old Guarders.
- Dem Bones: Appropriately enough, a skeletal lich's lair is guarded by skeleton warriors.
- Elite Mooks: While they are not particularly elite by Nazarick standards, they are significantly above regular skeletons in terms of strength, wear enchanted items and wield magical weapons. They seem to be Nazarick's first "serious" line of defense, as the basic skeletons are almost nonthreatening to most adventurers. Even a single Old Guarder, on the other hand, is a match for a Mythril-ranked adventurer, and Elder and Master Guarders are even stronger.
- Exactly What It Says on the Tin: Their primary purpose is to guard Nazarick, though Ainz has occasionally taken them outside of it.
- Law of Chromatic Superiority: Elder Guarders are distinguished from Old Guarders by their silvery plate armor. Master Guarders, the strongest variant and likely the strongest "free" monster in Nazarick, wear golden armor and red capes.
- Shock and Awe: At least one Old Guarder is known to wield a lightning-enchanted warhammer. It is unknown whether others may have different enchantments on their weapons.
- We Have Reserves: Unlike the more powerful denizens of Nazarick (who need to be resurrected using a ritual that consumes resources), these skeletons automatically respawn after a short period. Because they are also strong enough to be a serious threat to just about everything in the New World, Ainz makes a point of using them as Nazarick's first line of defense to avoid any potential casualties among more powerful NPCs.
A demonic steed that Albedo can summon.
- Awesome, but Impractical: Albedo can summon one, but can make absolutely no use of it as she is now. Albedo is a virgin, but she is madly in love with Ainz and will not sleep with anyone else, while Ainz cannot really solve her problem for obvious reasons (other than by just commanding her outright to have sex with someone else just so that one of her greatest assets in combat would stop being locked).
- Cool Horse: It looks extremely awesome and is level 100, which means that it's also extremely strong.
- Hellish Horse: It looks like a black horse, but has horns like those of a demon and Super Strength.
- Only the Chosen May Ride: As it's the opposite of a unicorn in every way, only non-virgins may ride it. If a virgin attempts to mount a bicorn, the creature is immediately drained of its energy.
- Virgin Power: Inverted, a virgin can not ride this creature.
RedcapsGoblins who wear red caps and wield scythes.
Dark YoungA high-level monster summoned by the Super-tier spell "Ia Shub Niggurath". The number of Young summoned is proportionate to the number of victims killed by the spell's initial damage.
- Attack of the 50-Foot Whatever: They stand ten meters tall, enough to tower over the average building in a medieval setting.
- Awesome, but Impractical: In YGGDRASIL. In addition to the spell taking forever and a day to cast like other Super-tier spells, at high levels, it would have been quite difficult to find enough targets squishy enough to die from the initial damage and all packed together in one spot to summon any Dark Young at all. In the New World, however, its large area of effect and powerful summons make it a great way to completely wipe out a large army of mooks in the flashiest way possible to drive in Ainz's superiority. As far as Ainz knows, nobody has ever been able to summon as many Dark Young in YGGDRASIL as he did in the New World.
- Combat Tentacles: Their main means of offense, short of simply trampling enemies underfoot.
- Eldritch Abomination: They look like black clusters of tentacles and gaping mouths on legs. Lore-wise, they are connected to Shub'niggurath, an eldritch entity referred to in the Cthulhu Mythos as "the dark goat in the woods with a thousand young". This explains their name, their incongruous bleating noises, and Ainz's nickname for them.
- Ironic Nickname: Nicknamed "adorable baby goats" by Ainz due to the above, despite being anything but adorable.
- Lightning Bruiser: Tough as nails, immensely strong, and - belying their ponderous, lumbering gait - fast enough to outrun warhorses at least.
- One-Man Army: Each of these things could destroy a kingdom in the New World on its own. Ainz summoned five of them.