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Notable Monsters & Summons 14
Death Knight
死の騎士（デス・ナイト）
A Lv35 defensive undead that can survive any single attack with 1 HP and draws enemy aggro; it is Ainz's go-to tank summon.
Soul Eater
魂喰らい（ソウルイーター）
A skeletal beast undead of difficulty 100–150 that emits a repeatable instant-death aura and grows stronger and heals by devouring souls.
Skeletal Dragon
骨の竜（スケリトル・ドラゴン）
A dragon-shaped undead about 3 m long made of countless human bones; it negates all magic of 6th tier and below and is considered the natural enemy of magic casters.
Death Warrior etc.
デス・ウォリアー 他
A series of undead on par with the Death Knight: the Death Warrior, Death Wizard, Death Priest, and Death Assassin, plus the Death Cavalier and others.
Dark Young
黒い仔山羊
Monsters of level 90+ summoned by the super-tier spell [Iä Shub-Niggurath] according to the number of people it kills; in Vol. 9 they trampled the Kingdom's army on the Katze Plains.
Eight-Edge Assassin
八肢刀の暗殺蟲（エイトエッジ・アサシン）
A spider-like assassin monster of level 49 (Web setting); blades sprout from its eight legs, it can attack 8 times, and it beheads its victims while invisible.
Gargantua / Golems
ガルガンチュア／ゴーレム
Golems are magical constructs that act on their master's orders; Gargantua is a strategic siege golem over 30 m tall that serves as the 4th Floor's Guardian.
Archangel Flame / Principality Observation / Dominion Authority
炎の上位天使／監視の権天使／威光の主天使
The summoned angels the Sunlight Scripture used against Ainz in Vol. 1; the Dominion Authority is said to have once defeated an Evil Deity.
Evil Lords
魔将（イビルロード）
Level-80s demons under Demiurge named after the Seven Deadly Sins; they can summon one another and appeared in the "Demonic Disturbance" (Gehenna) in the Royal Capital.
Shadow Demon
影の悪魔（シャドウ・デーモン）
A stealth demon that melts into darkness (close to level 30 in the Web setting), often dispatched by Nazarick for surveillance, messaging, and guarding.
Primal Fire Elemental
根源の火精霊（プライマル・ファイヤーエレメンタル）
A Lv87 high elemental shaped like a giant human figure of flame; Ainz summoned it with the guild weapon to test the Guardians.
Magical Beasts
魔獣
An umbrella term for animals with special abilities, ranging from those more intelligent than humans to those no smarter than ordinary beasts; they are relatively vulnerable to mind-control attacks.
Undead from Create Greater Undead
上位アンデッド創造の不死者
High-tier undead that Ainz makes with skills such as Create High Tier Undead, including the Eyeball Corpse, Pale Rider, and Grim Reaper Thanatos.