You need to save thralls on Old Hillsbrad Foothills to get access to this quest, and this instance.
Quest
The Black Morass
A World of Warcraft quest in The Black Morass. Facts and objectives from the current retail game data.
The highest voted Wowhead comments for this page. They are community notes, not TheWoWDB comments.
The Black Morass is the old Blasted Lands, back when the Swamp of Sorrows contained the Blasted Lands area. In this instance you must defend Medivh while he opens the Dark Portal or your world will end. The Dark Portal is of the same model of that from Warcraft 2.
Prereq:
http://www.wowhead.com/?quest=10285
Quest facts
The client quest POI data records no map location for this quest, so no map is shown.
Check whether you have already completed this quest
in-game: /run print(C_QuestLog.IsQuestFlaggedCompleted(10296))
Description
The Infinite Dragonflight have abandoned all pretense of subtlety. They plot to destroy the Guardian, Medivh, and prevent the Dark Portal from ever opening. While outwardly, this may appear a boon to the forces of the Alliance, it is in actuality catastrophic and will result in your world ending. You must venture through the timeway leading to the Black Morass. Go west and then south, past my future self, until you reach the tunnel that houses the swamp specimens. Cross over and speak with Sa'at.
Getting there
Inside the dungeon: The Black Morass
Deep within the Caverns of Time, the brooding dragon Nozdormu has awakened. Since the world was young, the bronze dragonflight has safeguarded the winding labyrinth, monitoring the shifting timeways to ensure that the delicate balance of time is upheld.
Bosses in the Adventure Guide, in order: Chrono Lord Deja, Temporus, Aeonus.
Entrance: The Gaping Chasm, Tanaris at 56.8, 62.5.
Instance text, bosses and entrances are the client’s Adventure Guide data.
Community notes from Wowhead · 19 comments
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Reward details
Reputation: Keepers of Time +250
The Keepers of Time are bronze dragons hand-picked by Nozdormu to watch over the Caverns of Time.
Reputation group: The Burning Crusade.
Other quests in The Black Morass that reward Keepers of Time reputation: The Opening of the Dark Portal (+500), WANTED: Aeonus's Hourglass (+350), WANTED: Rift Lords (+250).
Item facts are the current retail client’s (ItemSparse); the specialisations for a pick-one item are the ones the Blizzard quest API lists; faction and currency text is the client’s own. Lowest listed price = the US commodity auction house now.