Sapphiron's Lair

From WoWWiki

Sapphiron's Lair is located deep within Naxxramas, guarding the inner sanctum of Kel'Thuzad. The four quarters of Naxxramas must have been cleared in order to reach this point.

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