Mop of Selection can be obtained by having Altria Pendragon Alter (Rider, Summer 2017) reach Bond Level 10.
When equipped to Altria Pendragon (Alter, Rider) only, while that servant is on the filed, increase ATK by 20% & decrease DEF by 15% for all allies
Mop of Selection is an exclusive Craft Essence to Altria Pendragon (Alter, Rider, Summer 2017).
Rashoumon event (Ibaraki Douji event)
Murder at the Kogetsukan
Inheritance of Glory
FGO Reroll Tier List [5/11 updated!]
Best Craft Essence: Craft Essence Tier List
NP Charge & NP Seal - Craft Essences
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Hans Christian Andersen
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Black Holy Grail (The Black Grail)