Ancient Lair

The Ancient Lair in the Undercity Ruins

Undercity
		Ancient Lair	→	Undercity Ruins

The Ancient Lair is a Location within the Undercity in Act Three of Baldur's Gate 3. It is accessed through a passageway to the west of the Undercity Ruins waypoint.

Overview

Map of the Ancient Lair.

Main chamber

The main chamber is filled with chests surrounding an open sarcophagus. A hidden ( DC 10 Perception check) locked ( DC 20 Sleight of Hand check) door on the north wall opens to a second room. Opening any of the chests, looting the undead, or unlocking the door to the Workshop (see below) triggers an ambush by a horde of undead.

The active party members are not  Surprised, but inflicted with the  Spell Rot curse, although those with ties to undead, such as  Astarion and wizards of Necromancy school do not receive this condition. Climbing on the pillar in the north-western corner also removes spell rot temporarily.

Spell rot causes each character to take 2d6⁠⁠Necrotic damage per spell level every time they cast a spell, while cantrips and the cleric's Turn Undead ability do not trigger the curse. While the curse can be temporarily  removed, it is re-applied after three combat rounds (or 18 seconds out of combat). It is lifted upon leaving the lair.

If a party member is strong enough, it is possible to pick up at least one enemy before they awaken, effectively removing them from combat. This triggers the rest of the undead to rise. It is advisable to prioritize  Ancient Servants for this, as they are the most dangerous opponents in the room. The corpses can be disposed of later at the party's discretion. It is recommended that party members buff before triggering the Spell Rot curse.

Workshop

The locked ( DC 20 Sleight of Hand check) door hidden in the north wall can be revealed with a  Perception check. It leads to a workshop with a chopped up body and  Taron, a dead half-elf. The  Jar of Mystic Carrion's Brain is found on the central table, while  Jar of Mystic Carrion's Liver is in the locked ( DC 20 Sleight of Hand check) gilded chest. Destroying either of the jars causes a large explosion dealing 8d6⁠⁠Fire damage. Reading the book  Funerary Jar Form and Function on the nearby table, reveals that  Mystic Carrion has hidden his heart (in  Thrumbo).

A ladder to the north of the workshop leads back to the Undercity Ruins in a small previously inaccessible room north of the  Bareki.

Notable characters

Available to Speak with Dead

•  Taron

Related locations

• ⁠Undercity Ruins

Creatures

•  Ancient Servants
•  Crawling Claws
•  Greater Zombies

Related quests

• ⁠End Mystic Carrion's Immortality
• ⁠Find Mystic Carrion's Servant

Loot

Notable items obtained in this location, whether looted, purchased, or obtained as a quest reward:

•  Breaching Pikestaff
•  Jar of Mystic Carrion's Brain
•  Jar of Mystic Carrion's Liver