Master Mission is a set of seven optional missions that can be completed once and resets weekly, with a set of new missions. Each mission completion will reward you with two Saint Quartz Fragments.
Saint Quartz Fragment is a mini-material item that can be combined to create a Saint Quartz. This is one of the few, if not the most constant, way to gather Saint Quartz without spending money.
You need 7 Saint Quartz Fragments to create a Saint Quartz. Each week's mission list will grant you a total of 14 fragments, so you can get 2 Quartzes per week.
One of the missions available every week will always be 'Complete all other Master Missions this week.' So it will not be listed here.
This section will update weekly.
This section will provide the easiest, most AP-cost effective way to complete the Master Missions that appear.
Rashoumon event (Ibaraki Douji event)
Murder at the Kogetsukan
Inheritance of Glory
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Black Holy Grail (The Black Grail)