An execution honorably performed indeed. With that task out of the way, I have but one more of these special duties for you. And I'm sure you can guess what that might be.

Mah-ja awaits her fate below our feet.

Our agents found and captured Mah-ja using the information you gathered. After some "intense" negotiation, we obtained the information we needed to locate the Dark Brotherhood base. As a reward, I give you the task of performing her honorable execution. She awaits you in the basement.