7th Singularity Babylonia: Cutah free quest is the best AP-saving & time-saving location to farm Ghost Lantern. You'll get around 3-4x Ghost Lantern by spending 210AP.
2nd Singularity: Mt. Etna free quest is the first location you unlock to farm Ghost Lantern.
Rashoumon event (Ibaraki Douji event)
Murder at the Kogetsukan
Inheritance of Glory
Demon (Demonic) Servants & Enemies
5 Star Servants Tier List: Best Servants [5/9 updated!]
Device Transfer Guide
How to build an Arts team
Berserker - Craft Essences
Henry Jekyll & Hyde
The Phantom of the Opera