FYI - I would probabily wait before you look into doing the dungeon.
Its currently bugged and not working as intended.
Issues
1: Upon queuing for the Dungeon, when joining the group, it does not teleport you to the dungeon.
2: It is not giving you a box on completion (Heart-shaped box) like it is meant to like the headless horsemen dungeon did in October meaning, you have to run the dungeon 5 times on every toon and hope the mount drops and then you win it rather than doing it once a day on each of your toons and hoping you got tyhe mount in the bag from the daily drop. (Assuming that they haven’t already removed the mount from the drop table because its meant to be in the heart-shaped box)