Kill Marshal Redpath and 8 Rotbrain undead.
While you were taking care of matters for Executor Arren, I went off on an assignment of my own. Shadow Priest Sarvis asked me to peek in on the Rotbrain camp.
There's a reason why they're called Rotbrains.
Their leader goes by the name of Marshal Redpath, and he's an absolute beast.
Look, <name>... the attack is starting. You're better in combat than I am. Get in there and help out!
When you're done, meet up with Shadow Priest Sarvis in the chapel. Good luck, <name>.