Most challenging Heroic dungeon in WotLK ?

What Heroic dungeon do you feel is the most challenging to complete? Please be sure to post your reasons why!

• Ahn’kahet


• Azjol-Nerub


• Culling of Stratholme


• Drak'Tharon Keep


• Gundrak


• Halls of Lightning


• Halls of Stone


• Nexus


• Oculus


• Utgarde Keep


• Utgarde Pinnacle


• Violet Hold