How to do the specific process of KLZ task?

Karazan task chain and key (everyone in the team needs a key to access the copy)

Everyone in the team must have a "master key" to enter Karazan. The task began with a woman at the door of the copy. She will give you two single-person tasks that can be completed at the gate of the tower. Then you need to go to Dalaran and talk to a mage in the north of the city. Then you will get a task to get the first part of the key from a box near the Voidwalker in the Shadow Labyrinth (a wing of the 70-level copy of Ogington), the second part from Akatraz (a wing of the 70-level copy of Storm Fortress) and the third part from the Steam Room (a wing of the 70-level copy of Panya Reservoir). When you get the three parts of the key, you must complete the task of "opening the dark door" in the cave of time (you must complete the task of "escaping from Dunhold" in advance) before you can find Medivh to complete the key.

Mission line: Depart from outside Karazhan.

Anger of arcane

Mission objective: Use purple divination crystal near the water source in the master cellar, and then report to the exorcist Altug gruss outside Dalaran.

Task reward: 4 gold and 40 silver

12650 Experience (level 70, 7 gold and 59 silver)

250 points purple eye reputation

"Communication in Dalaran"

Mission objective: Take Altug Ruth's report to the exorcist Kadrick outside Dalaran.

Task reward: 6250 experience (level 70, 3 gold and 75 silver)

75 points purple eye reputation

"Khadga"

Mission objective: bring Altug Russ's report to Khadga in Chatlas, Troga forest area.

Task reward: 6250 experience (level 70, 3 gold and 75 silver)

75 points purple eye reputation

"Enter Karazhan"

Mission objective: Khadga wants you to enter the shadow maze of Ogington and find the first key fragment in the mysterious treasure chest.

Task reward: 12650 experience (level 70, 7 gold and 59 silver)

250 points purple eye reputation

"second and third segments"

Mission goal: find the second fragment of the key from an arcane treasure chest in Panya Reservoir; Found the third key fragment in the mysterious treasure chest of Storm Castle. When finished, return to Khadga, Chatteras.

Task reward: 15800 experience (level 70, 9 gold and 48 silver)

350 Purple Eye Reputation

Then complete the "black swamp" mission in the cave of time to get the key.