On the island of Caer Darrow lies Scholomance - a school that serves as a stronghold for the Scourge. Our enemy dwells within, safely allowed to pursue research that strengthens their power. A door bars the way, and try as we might no entry is to be had without a proper key.
Apothecary Dithers is well versed on Scholomance, and has an idea how to obtain a key. You have proved your value to me as someone who can get things done; I now entrust this task to you. Speak with him on this matter.
Yes, <class>, the High Executor mentioned you might be the one to trust in the matter of the key. I've dedicated a fair portion of my recent studies to the Scholomance, and I believe I know a means by which you can acquire one that will let you past the front door at will.
This task will not be easy, but such tasks seldom are. You most assuredly look like the type to know this as fact.