The Perfect Dissemblance

Objectives
Agent Skully at New Hearthglen has asked you steal the image of a Onslaught Raven Priest. Return the Banshee's Magic Mirror to her when you have done so.
 * Onslaught Raven Priest's image stolen
 * Banshee's Magic Mirror (Provided)

Description
You may wonder how I can maintain this guise; I use a magic mirror that was loaned to me by the spy mistress.

It only has so much power in it, but I think there's enough for the both of us. Here, take it. I want you to use it to impersonate one of the Onslaught raven priests.

Be quick about it... I have no idea how long my glamour will last while you have the mirror.

Realize that you won't immediately be perfectly disguised, so don't count on it being foolproof until I've had a chance to help you.

Rewards
You will receive:

Progress
Please tell me that you didn't break the mirror?!

Completion
Not bad,. Now that the priest's image is trapped within the mirror, I have something else that needs doing.