7th Singularity Babylonia: Observatory (Mother Sea) free quest is the best AP & time-saving location to farm Seashell of Reminiscence. You'll get about 4~5x Seashell of Reminiscence by spending 210AP.
3rd Singularity Okeanos: Archipelago (Hidden Island) free quest is the first location to unlock where you can farm Seashell of Reminiscence.
You can also farm Seashell of Reminiscence Sunday Daily Quest: Saber Traning Ground. For other item drops, check the table below.
| Quest | Item Drop |
|---|---|
| Saber Training Ground |               |
| Ember Gathering [All] | EXP Cards (All) |
| Enter the Treasure Vault | QP |
| US/EN (UTC) | |
|---|---|
 Ibaraki Douji event: Rashoumon May 16 - 30 | - |
| JP (JST) | |
 Fate/Apocrypha Event: Inheritance of Glory Apr 29 - May 13 |  Murder at the Kogetsukan May 11 - 18 |
| Master Missions | |
|---|---|
| JP May 7 - 13 | US May 7 - 13 |
| Pickup Servants | ||
|---|---|---|
 Shuten Douji | ||
| Pickup CEs | ||
 Fox's Night Dream |  Burning Love Story |  Subscription List Reading |
| Pickup Servants | |
|---|---|
 Achilleus (Achilles) |  Chiron |
| Pickup Craft Essences | ||
|---|---|---|
 A Pilgrimage Towards Him |  The Moment of Destruction |  Let's Depart! |
