This craft essence is currently unavailable on the EN ver.Dive to Blue is can be purchased from Death Jail Summer Escape event shop.
For the duration of "Death Jail Summer Escape" event, this craft essence gains the following effects:
Here is a list of servants & CEs that can be obtained for the duration of the Summer 2017 event part 1: Dead Heat Summer Race and part 2: Death Jail Summer Escape.
Rashoumon event (Ibaraki Douji event)
Murder at the Kogetsukan
Inheritance of Glory
Device Transfer Guide
Best Craft Essence: Craft Essence Tier List
FGO Reroll Tier List [5/11 updated!]
Saint Quartz Farming Guide
NP Damage - Craft Essences
How to Complete Master Missions [JP May 7 - May 13]
Demon (Demonic) Servants & Enemies
Black Holy Grail (The Black Grail)