The Necrotic Vault is the final room of the Plague Quarter in Naxxramas. The fungal monster Loatheb, a foul experiment combining the Plague of Undeath with the bog beasts of Azeroth's swamps and marshes, is held within the Vault.

v • d • e Subzones of Naxxramas Arachnid Quarter (Maexxna's Nest) · Construct Quarter (The Halls of Reanimation) · Frostwyrm Lair (Kel'Thuzad's Chamber · Sapphiron's Lair) · Military Quarter (The Horsemen's Assembly) · The Outer Ring · Plague Quarter (The Necrotic Vault)