The first part is available from subclass level 50; the final part requires 75.
The four Possessor of a Precious Soul parts start at subclass levels 50, 60, 65 and 75 respectively. The first begins with Talien, the second with Virgil, and the third and fourth with Caradine. Complete the preceding parts; the final level requirement must not be applied to the entire chain. These are minimum levels: a subclass already at level 75 can still start the first part.
After completing the chain and its subclass-level requirement, Noblesse status applies to both the main class and subclasses. It grants access to special teleports and Noblesse abilities. Olympiad still requires the main class.
Talien’s route moves through stories of the old heroes: Gabrielle and Gilmore, Baraham’s record, Kantabilon’s echo crystal and Stedmiel’s poetry book. It then leads to Virgil’s family in Rune. Help obtain medicine for Kassandra, then continue to Caradine and Noel in Goddard. Noel requests five Lunargents and one Hellfire Oil. Prepare these materials while advancing the subclass instead of waiting until the final Noblesse level requirement.
After the first part, follow Virgil’s chain through Kassandra and Ogmar. Investigate the scene in the Swamp of Screams, obtain the clue from the angel corpses and speak to the Mysterious Dark Knight. Witch Kalis and Alchemist Matild continue the investigation. The route then leads to the Fallen Unicorn in the Valley of Saints; complete that objective and return to Kassandra.
Caradine sends you to Ossian. Recover the Ring of Goddess from a Pilgrim of Splendor and the Necklace of Goddess from a Judge of Splendor, then return both to Ossian. His next objective is the Rain Song staff from Flame of Splendor Barakiel in the Valley of Saints. After that encounter, report to Ossian and take the relics to Ladd at the Ivory Tower. Reach the relevant quest step before arranging the boss hunt.
With part 3 completed and the active subclass at least level 75, return to Caradine. Her final conversation brings you to the Lady of the Lake. Complete the encounter and dialogue to receive the status; simply reaching subclass level 75 does not finish the quest. Keep the four parts in order and distinguish their individual minimum levels from this final requirement.