
On Orrian Shores
Find the ship that Exemplar Kerida has waiting for you. Request permission to board the Shining Blade's boat. Explore the Orrian coast to see if the Eye of Janthir is here. Board the boat to Orr. Gather intel on what's happening here. Find Firstborn Dagonet. Talk to Firstborn Dagonet. (Kill a ley-line scavenger and use its energy to reclaim the corpse of an undead.) Kill ley-line scavengers and use their magical organs to reclaim undead corpses.: x/3 Talk to King Reza.
The ferry can be found east of Macha's Landing in Lion's Arch. Speak to Shining Blade Agent Bilman, then board the ship. Once you arrive in Orr, speak to Camp Coordinator Philia, then head west into Melandru's Reliquary to find Dagonet standing next to King Reza, the heart vendor. After speaking to them, pick up a Ley Organ (found on Ley-Line Scavenger corpses) and channel Skill #3(skill 3) to cleanse three Risen corpses. The corpses are the graphical remains of the Unchained after you have killed them, and they will not be labeled or interactable. They will also despawn fairly quickly, so you will need to kill a Ley-Line Scavenger right before or after killing an Unchained. Do not pick up the Ley Organ until you have killed the Unchained. (You may want to kite a handful of Risen to a Ley-Line Scavenger then AOE them all down.) Skill 3 will create an Area of Effect centered on your character and one of the corpses must be in it. The ley organ will be consumed each time you cleanse a corpse, but more than one may be cleansed at a time if you are able to fit them within the skill's area of effect. Speak to King Reza once you are done to complete the mission. This will also complete the heart, if you hadn't done so already.