Trouble at Auchindoun Shadow Labyrinth Quests in Burning Crusade Classic Report to Field Commander Mahfuun at the entrance to the Shadow Labyrinth at Auchindoun in Terokkar Forest.

68 is the minimum level.

NPC quest

Spymistress Mehlisah Highcrown, Shattrath City, /route 50.6 45.6

Field Commander Mahfuun, outside the entrance of Sethekk Halls, /way 40.0 72.2
Rewards: Lower City has a 150 reputation.
9,500 experience

The Codex of Blood
In the Shadow Labyrinth of Auchindoun, read from the Codex of Blood. The second half of the quest line that begins with Trouble in Auchindoun.
Minimum Quest Level: 68 NPC
Begin with: Field Commander Mahfuun, outside the Sethekk Halls entrance, /way 40.0 72.2 Ends: The Codex of Blood, Shadow Labyrinth, in front of Grandmaster Vorpil, the third boss.
350 reputation with Lower City 25,300 experience

Into the Heart of the Labyrinth
Destroy Murmur, the final boss in Shadow Labyrinth, in Into the Heart of the Labyrinth. Trouble in Auchindoun is the third component of a quest line that begins with Trouble in Auchindoun.
Minimum Quest Level: 68 NPC
Begin: The Codex of Blood, Shadow Labyrinth, in front of Grandmaster Vorpil, the third boss.
Spymistress Mehlisah Highcrown, Shattrath City, /path 45.6 50.6
500 reputation with Lower City 25,300 experience

The Soul Devices
Steal 5 Soul Devices and give them to Spymistress Mehlisah Highcrown at Shattrath City’s Terrace of the Light.
Level Requirement: 68 Quest NPC
Starts with Spy To’gun, Shadow Labyrinth, and going through the first room.
Spymistress Mehlisah Highcrown, Shattrath City, /way 45.6 50.6
350 reputation with Lower City as a reward
25.300 experience

Quests for the Chained Shadow Labyrinth
The Book of Fel Names
Blackheart the Inciter can provide you with the Book of Fel Names.

This is the sixth phase in a lengthy quest sequence. It begins differently depending on whether you are Aldor or Scryer:
Scryer: Karabor Training Grounds, from Larissa Sunstrike at the Sanctum of the Sun, Shadowmoon Valley, /way 55.6 58.2 Aldor: Karabor Training Grounds, from Exarch Onaala at the Altar of Sha’tar, Shadowmoon Valley, /way 61.2 29.2
68 is the minimum level.
Quest NPC
Starts/Ends: Altruis the Sufferer, Sunspring Post Road, Nagrand, /way 27.4 43.0
Rewards: 25,300 experience points

Demonica’s Lexicon
This quest is part of a lengthy chain that begins in Shadowmoon Valley with Illidari-Bane Shard / Illidari-Bane Shard. It entails tracking down an Illidari-Bane Shard Or Illidari-Bane Shard. Overseer Ripsaw drops it in Legion Hold, Shadowmoon Valley at /way 24.8 35.6. When clicked, a lengthy quest line that takes you through multiple dungeons begins; Lexicon Demonica is the sixth phase. This step is only available in Normal mode.
67 is the minimum level.
Quest NPC
David Wayne, Terokkar Forest, east of Firewing Point, /way 77.6 38.6
Rewards: 25,300 experience points

Entry Into Karazhan
Take the First Key Fragment from an Arcane Container that has been concealed there.

This Arcane Container may be discovered on a ledge to the left of the pool in the area with the final monster, Murmur. Because opening the container will summon a First Fragment Guardian, it may be preferable to kill Murmur first.

Minimum Quest Level: 68 NPC
Begin/End Points: Khadgar, Shattrath City, /way 54.8 44.6 Reward: A reputation of 250 with The Violet Eye.
25.300 experience