Sub-Singularity III: Shimousa-no-Kuni Castle Town free quest is the best place to farm Kotan Magatama.
Sub-Singularity III: Shimousa-no-Kuni Toke Castle free quest is the place you can farm Kotan Magatama and Bizarre Godly Wine.
Rashoumon event (Ibaraki Douji event)
Murder at the Kogetsukan
Inheritance of Glory
4th Singularity: London
5 Star Servants Tier List: Best Servants [5/9 updated!]
Vlad III
Best Craft Essence: Craft Essence Tier List
Caster
Forbidden Page
Dragon's Meridian
Ereshkigal
Arthur Pendragon(Prototype)
Gorgon
Black Holy Grail (The Black Grail)