Way of the Knight-Enchanter

at the Old Thoroughfare, the Weeping Spires, and Granite Point

Way of the Necromancer is a side quest in Dragon Age: Inquisition. It is one of three potential quests which a mage Inquisitor can complete in order to obtain a Specialisation.

Acquisition
This quest is not available until after From the Ashes has been completed. Go to the War Table in Skyhold, and a quest for the Inquisitor to choose a Specialisation will be available. Three potential trainers, one for each specialisation, will arrive at Skyhold to teach a mage Inquisitor a specialisation (unlike in previous games, only one can be learned). To access this quest, talk to the Knight-Encahnter trainer, Commander Helaine.

Walkthrough
The following materials must be required in order to finish this quest:
 * Writings on knight-enchanter methods: this can be obtained from either Vivienne or the book merchant in Val Royeaux.
 * Da3-091.jpg Wisp essences: These can all be found in The Fallow Mire. They can be found at Old Thoroughfare, the Weeping Spires, and Granite Point. When an Pure wisp is killed in these areas, they have a chance of dropping its essence. It may take multiple visits to an area in order for them to drop one.
 * 10 lazurite: These can be found in The Western Approach, Exalted Plains, and Hissing Wastes. You can mine it yourself, but you can run the mission Hissing Wastes Resources with Cullen if you'd rather not collect those yourself.
 * Materials for a jewelled skull.

Rewards
Completing this quest will allow you to obtain the Necromancer Specialisation.

Other

 * All three specialisation quests can be done at once, however, only one can be completed.