BC Instance Keys

[Kuracynn]

Here is what I have so far. More to come.

Hellfire Citadel
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Key to Shattered Halls - Drops off the last boss of the Blood Furnace instance. This key is obtained from a quest chain that starts from a drop off a named orc in Shadow Moon Valley.
Flamewrought Key - Sold for 10g by the logistics officer in Honor Hold. Requires Neutral standing with Honor Hold. This unlocks the heroic setting.


Coilfang Reservoir
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Reservoir Key - Sold for 10g. Requires Revered standing with Cenarion Expedition. This unlocks the heroic setting.


Auchindoun
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Shadow Labyrinth Key - Thottbot says this drops off a boss in the instance above it. I'm thinking this is a mistake, could come from somewhere else.
Auchenai Key - Sold for 10g. Requires Revered standing with The Lower City. This unlocks the heroic setting.

Tempest Keep
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Key to the Arcatraz - Created by merging two items. One off a boss in the Mechanar the other piece is currently unknown (to my knowledge)

[ariond]

Shattered Halls key is a 4 quest chain that starts with a drop off Smith Gorlunk
and orc in Shadowmoon Valley

Shadow Labyrinth key drops from Talon King Ikiss, final boss, in Sethekk Halls

remember that all Heroic keys can be bought from the respective faction quartermaster at Revered reputation with that faction
since u are revered you will get a 10% discount on all items
so the heroic keys will only cost your character 9g