Eternal Spirit

Eternal Spirit is a Blade Quest in Xenoblade Chronicles 2. It can be received by reading the notice board in the in Goldmouth, Argentum Trade Guild, after both unlocking the second level of Perun's Chivalry  and her fourth Key Affinity reward, provided Nia, Tora, Mòrag, Zeke and Perun are in the party. Completing it will unlock the third level of Perun's Chivalry Field Skill.

Quest objectives

 * Talk to near the Goldmouth Flight Deck in Argentum.
 * Ask around for more information on the first floor of Argentum.
 * Report to Silas near the Goldmouth Flight Deck in Argentum.
 * Complete the Merc Mission "Child Disappearances".
 * Talk to Perun at Fonsa Myma Port in Uraya.
 * Talk to Darryth in the in Uraya.
 * Complete all three objectives:
 * Talk to Lacie in the Entertainment District in Uraya.
 * Talk to Celtie in the Commercial District in Uraya.
 * Talk to Daffydd in Gwenith Paddies in Uraya.
 * Search for the children in the area around Lake Varna in Uraya.
 * Reaching the area requires clearing a Water Mastery level and Fortitude level 1 Field Skill check.
 * Defeat the Tronk Aligo at Lake Varna in Uraya.
 * Talk to Dianna in the Commercial District in Uraya.
 * Search for Martal's parents in Theosoir in Tantal.
 * Head to Genbu Port in Tantal at dawn.
 * Defeat the Drivers in Genbu Port in Tantal.
 * Both the Edin Driver and the Radys Driver must be defeated.
 * Gather information at Port Anangham in Mor Ardain.
 * Head to the old factory in Mor Ardain.
 * All fast traveling into the Old Factory from this point on and until the end of the quest will be disabled.
 * Rescue the captured children from the old factory in Mor Ardain.
 * Siarmal can be found in the attic of the Ether Control Tower which requires a Fortitude and Superstrength level 2 Field Skill check to access.
 * Vend can be found at the topmost floor of the Quality Control Tower.
 * Wotawota can be found in the Nopon Workers' Quarters.
 * Maqqa can be found on the second floor of the Work Observation Tower.
 * Join up with Perun at the Artificial Blade adjustment room in the old factory in Mor Ardain.
 * Defeat the Drivers (3) in the Artificial Blade adjustment room in the old factory in Mor Ardain.
 * The Vallent Drive is accompanied by a Gardyll Driver and a Zohak Driver
 * Head to Bulge Harbor in Mor Ardain.
 * Defeat the Lindwurm soldiers (7) at Bulge Harbor in Mor Ardain.
 * The lindwurm forces are comprised of three Lindwurm Falcon, two Lindwurm Hind, one Lindwurm Drake and one Lindwurm Cougar.

Results
"Dr. Castrofari receives a stern judgment, and the children are returned to their homes."