Speak to Apprentice Mirveda at the East Sanctum in Eversong Woods.
Thank you for your help, [player]. While I get things back in order here, I'd like to ask you for a favor. One of my former apprentices embarked in a very dangerous line of research. She journeyed to the East Sanctum, in the middle of the Dead Scar.
I worry for her well-being. See if you can find her and convince her to return to her senses.