Enter the East Natatorium in the Trade Court at ( -683, -16, 223 ) Copy/waypoint -683, -16, 223 to spawn and kill a group of four undead pilgrims and an undead shepherd. These are the small pools of water on both sides of the Trade Court. Approaching them spawns the shepherd and pilgrims.
Enter the West Natatorium at ( -586, -16, 229 ) Copy/waypoint -586, -16, 229 and kill the mobs that spawn from there.
Kill channel prowlers for a common update. They are found back near the Steward. ( -354, 12, 334 ) Copy/waypoint -354, 12, 334