Act III Key Fieldwork
Return to Eido in the Last City.
You've defeated the Scorned Organist in Fikrul's Revenant Fortress and used the salvage you found to upgrade Eido's Tonic Laboratory. Speak to Eido.
"Seems like everything about the Scorn ends in destruction and nihilism. Let's see if we can salvage their relics into something more… productive." —Eido