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.$B$BApothecary 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.