Returning the Favor

Now you must plant the seed of war in the fat, useless heads of the Warmaul. To the northwest, near the mountains, you will find the Laughing Skull Ruins.$B$B<Lantresor points into the crate of armaments you brought him.>$B$BDo you recognize those banners? They are Kil'sorrow banners. I want you to take a stack of Kil'sorrow banners and plant them on the corpses of Warmaul ogres. Remember, northwest is where you will find the ogres.