Head through the mirror and you will be able to choose your party members to tag along into the Crossroads. Continue following the blood trail into the adjoining room where you will find an active Eluvian. This will take you to the top floor of the palace (only time you'll be able to access those last tilted paintings). You will now need to use your search function to follow the Qunari's blood trail up a nearby trellis. Rudely leave the council meeting and meet up with Leliana who will inform you that a dead Qunari has been found inside the palace. The council proceedings will not get too far along, before you are interrupted by a messenger stating the Leliana would like to speak with you. Once you have spoken with both ambassadors you will be able to head to the palace entrance to trigger the first Exalted Council meeting.
Both men are marked with quest markers on your map.
Now that you are done catching up with your companions you will need to talk with Teagan Guerrin and Cyril de Montfort before you can move on with the main quest. There are 5 paintings that can be fixed: in the bar, in a small room to the north of the bar, in the bathhouse, and two on the top floor of the palace that can only be accessed after you trigger the first Exalted Council meeting. Fixing any painting that is not hanging correctly will grant you +2 strength each time.
By turning this trial on right at the beginning of this DLC I was able to unlock the achievement Trial of the Emperor just before the ending, so hopefully this will work for you too. This trial will promote certain enemies to make them stronger. Make sure to toggle on the trial Walk Softly. Press Start, select Options and then Trials.
The first thing you should do now is go into your menu settings. After the intro scene you will be out in the Palace's Courtyard. So if you're ready to begin start the operation and you will be transported 2 years into the future where you are attending the Exalted Council at the Winter Palace. That means Skyhold as well!! You've been warned. Once this operation is selected you will be locked out of all previous areas you have ever been too. Make sure you have everything done that you want done in your playthrough before beginning the Exalted Council. As mentioned just a second ago, you must have an end game save after beating Corypheus for this war table operation to appear. To begin this DLC you will need to start the War Table Operation "Attend the Exalted Council". This guide will start off by covering the new content and will follow with the partial play through at the end dealing with the different trial achievements.