Indestructible Sword can be obtained by having Brynhildr reach Bond level 10.
Imperishable Flame is Brynhildr's Max Bond CE and exclusive to her.
Rashoumon event (Ibaraki Douji event)
Murder at the Kogetsukan
Inheritance of Glory
Best Servants [★4]: 4 Star Tier List
Best Craft Essence: Craft Essence Tier List
How to Complete Master Missions [US May 7 - May 13]
Fate Grand Order Farming Items
Altria Pendragon
Holy Night Supper
Cursed Arm Hassan
Marie Antoinette (Caster)
King Joker Jack