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
Best Servants [★4]: 4 Star Tier List
Anne Bonny & Mary Read (Rider)
Berserker - Craft Essences
Ushiwakamaru
Altria Pendragon (Lily)
Passionlip
Chaldean S.I.U.
Ereshkigal
Arthur Pendragon(Prototype)
Gorgon
Black Holy Grail (The Black Grail)