At present one of the most popular dungeons in World of Warcraft is Karazhan. Here is the steps for obtaining "The Master's Key" to get in and how to do the quest well. As of Patch 2.4, you no longer need to do this chain of quests to get into Kharazan, so you just need to ask someone to open the door for you, however you still can do this to obtain the key by yourself if you like. Also you can get wow gold on the way when you are available.
First in Deadwind Pass travel to Karazhan, where you can be given two quests from Archmage Alturus, and one is Restless and another is Activity Arcane Disturbances, which you do in the immediate area. Upon completion, with the quest Contact Alturus sends you to Dalaran from Dalaran.
Go to the north side of the bubble to speak to Archmage Cedric at Dalaran. The guy gives you the quest Khadgar to return to Shattrath.
Speak to Khadgar when you go to the center of Shattrath, the guy who asked you to decide which faction you wanted to align with and also who you started the guided tour at. Entry he gives you into Karazhan, which requires a trip to Shadow Labyrinth in Auchindoun. To obtain the first key fragment is your goal, the last boss in Shadow Labyrinth, which located near Murmur. When you open the container an elite guard spawns, loot the fragment off of its corpse. With your fragment return to Shattrath. Note that it is possible to sneak by Murmur if you are a rogue, druid, or mage and fight the spawn without fighting Murmur.
When you return to Shattrath, Khadgar asks that you obtain the second and third key fragments. In the Steamvault in Coilfang Reservoir you can find the second key fragment. The container is in the corner at the bottom of a deep pool of water near the first boss. Note: The second key fragment was originally lootable from the box directly, and could be done solo by mages, druids and rogues. With patch 2.0.7, when you open the container the key is now looted off of an elite guard that spawns. For this reason, you may be more successful if you go with others. (Druids are still ok - he is a beast so hibernate will work when you need a rest)
In Arcatraz in Tempest Keep in Netherstorm is the third key fragment, accessible by a flying mount or flying form. A key or a rogue with 350 lockpicking is required for Entry into the instance. You don’t need to kill any bosses to get to the key shard, located up the "glass" ramp in the first room where you encounter voidwalkers. As you enter, in the corner of the room the container is to your immediate right. Note: As with the second key, this one requires a group to kill the guard. Two rogues can distract the patrolling voidwalker while a druid (feral) and another rogue kills the guard (with the first rogue distracting joins the fight) can make things easier. Still stealthable, just challenging.
Hand your second and third key fragments to Khadgar and return to Shattrath. He then sends you to The Black Morass in the Caverns of Time to speak to Medivh, who activates your key. Note: Opening the Dark Portal is required for this step, where you protect Medivh from waves of mobs (including elites) while he opens the Dark Portal. From every sixth portal a boss will spawn. After the 18th portal the Dark Portal will open and the task is complete. You can now speak to Medivh and claim your Master Key to Karazhan. Note: If you are not inside of the instance when Aeonus is killed, you will not be able to speak with Medivh.
Return to Khadgar in Shattrath, and he gives you The Master's Key. He then gives you the quest The Violet Eye. This sends you back to Karazhan, where your Karazhan quests will begin.
Above is the guide for World of Warcraft Karazhan, and hope this guide can help some players. For more information of World and Warcraft, welcome you to visit Mmogah.com. Also if you have requirement in power leveling, Mmogah will be your best choice, as they have more than 10 years gaming industry experience and professional customer service staffs, you don’t worry about cheating after making orders.