It is not possible to do the original Mage Tower Challenges or earn the associated appearances.

Information on why rewards may not have been granted after the Battle for Nazjatar Event

Information about the quest item to receive the companion pet Stardust, the reward for completing the quest Raiding With Leashes IV: Wrath of the Lick King

What to do when the achievement Sojourner of Rivendreth can't be completed

Information regarding resources which can be used to locate the next quest in a chain.

Troubelshooting the achievement Sinister Calling.

Information about this questline

What to do if you lost a reward granted by an achievement.

Information on completing the achievement "A Nation United"

Information on being unable to start the new Dark Iron Heritage quest line even though the requirement is met.