Be prepared to meet the 1000 Provisions of the Holy Sword Excalibur. Some include...

Provision #22: On a refreshing morning, start out with a refreshing greeting.
Provision #75: Celebrate Excalibur's birthday* in grand-style.
Provision #452: Attendance of a full duration, non-skipping Main Story Scenario is mandatory.
Provision #578: You must never tell a lie.
Provision #602: You must prepare all foods with HQ Ingredient.

*Every day is considered Excalibur's birthday.