DK Mage Tower - Done!

The Mage Tower was a challenging quest for each spec which rewards a unique weapon.  It is located on The Broken Shore at Deliverance Point and initially was only up when enough Legionfall War Supplies has been turned in to spawn it.  It would then remain active for 3 days before being destroyed and needing to be rebuilt.  As the Mage Tower challenges, and therefore the unique weapon skins, were to be removed in the pre-patch, the Mage Tower was made continuously active for the two weeks prior to the pre-patch so people could try to get them before they are gone. With the ever increasing artifact power this also became a little easier as you become more powerful each day.

To start the challenges you needed to have completed the initial story line on the Broken Shore and have done the quest to unlock your upgraded artifact weapon.  Speak to War Councilor Victoria who stands outside the tower and she will offer the quest.  The first attempt each day is free and after that each attempt costs 100 Nethershards.

For the DK there were three challenges, one for each spec.  The first one I achieved was Unholy, then Frost and on the very last day, finally Blood.  For completing your first challenge you get the achievement A Challenging Look - Complete an artifact challenge quest line and unlock a new appearance for your artifact weapon.

And for completing all challenges on your character you get the achievement Fighting with Style: Challenging - Unlock all of your challenging artifact appearances.

Also see posts: Mage Tower: Unholy DK, Mage Tower: Frost DK and Mage Tower: Blood DK