Heart of Disruption
Accept the quest to get the Dalaran Sewer Key, then bring back the Arcane Mote from the end of the dungeon.
Accept the quest to get the Dalaran Sewer Key, then bring back the Arcane Mote from the end of the dungeon.

Accepting it gives you the Dalaran Sewer Key; only one player in the group needs a key to enter.
It cannot be shared, so every player has to talk to Modera.


Accepting it gives you the Dalaran Sewer Key; only one player in the group needs a key to enter.
Horde hand it in to Voidglare in Tarren Mill, not to Modera.
Not yet confirmed by players in WoW Forever; details may differ.
Alliance: Image of Archmage Modera in Silverpine Forest (68.6, 45.2). Horde: Image of Archmage Modera in Silverpine Forest (68.6, 45.2).
Alliance: Image of Archmage Modera in Silverpine Forest (68.6, 45.2). Horde: Magus Wordeen Voidglare in Hillsbrad Foothills (61.6, 20.8).
Alliance: Spellguard Pauldrons, Renewing Footpads, Defender of Dalaran, Dalaran Sewer Key, 9,400 XP. Horde: Battle Spaulders, Enchanted Sandals, Striking Staff, Dalaran Sewer Key, 9,400 XP.
Heart of Disruption is a level 33 quest; you can pick it up from level 24. It takes you into City of Dalaran.
All City of Dalaran quests on one map ·City of Dalaran dungeon guide
Sources: Quest data from ForeverDB.net · ForeverDB: City of Dalaran · ForeverDB: An Alarming Request · ForeverDB: Prison Break In · ForeverDB: Key to the City · ForeverDB: Dalaran Patrols · ForeverDB: Heart of Disruption · ForeverDB: Friend of the Kirin Tor · ForeverDB: Starving Arcane · ForeverDB: Power Overwhelming · ForeverDB: The Grave Knight · ForeverDB: Source of Power · ForeverDB: Opportunistic Education · Warcraft Wiki: City of Dalaran · Warcraft Wiki: Blood in the Streets · Warcraft Wiki: Heart of Disruption (Horde) · Warcraft Wiki: Shrewd Negotiations · Warcraft Wiki: A Green Sample · Warcraft Wiki: Rexxie Copperclutch