Automatically flash your Uncrowned Insignia to the three gatekeepers in Legion Dalaran to open the way to the Hall of Shadows, without having to click the dialog option. If you need to actually buy something from one of these NPCs, hold any modifier key (Shift, Alt, or Ctrl) as you talk to them.
This is an update to halsey1006's Uncrowned Insignia. At first, I was simply trying to update the addon to use the new API calls. However, I found that some things could be done differently and ended up basically rewriting the whole thing. This incarnation should be more efficient and not language-specific.