Numerous inauthentic Holy Grails have been created throughout the course of human history, of greater or lesser potency. The Great Grail of Fuyuki, for two centuries, served as a potential wish-granting device that could theoretically allow any magus to reach the Root... or grant any other wish that the user might desire. But like all good things, it was corrupted and came to an ignoble end.
Magi being a group that could recognise a useful idea but not the potential downsides, it was almost inevitable that some would take the bright idea of trying to literally carve out the useful parts, force it into a more useful shape, and make a new one. Because if the idea was sound and you couldn't do a better one yourself, why not copy it? Wanting to avoid the disastrous "war" step, however, they sought out another source to try and power it, stealing from the Ise Grand Shrine... and managing to put the Yata no Kagami to use.
This did not work according to plan. Trying to drive something, in the end, created by a homunculus known as the Archmage of Winter using a divine artefact of the Sun Goddess was surprisingly incompatible, and although more than enough power was gathered, the entire thing blew up in their faces. Literally.
The shards of the grail reemerged unexpectedly over time, with the grail ritual seeming to have started itself: Masters intentionally or unintentionally catching wind of the idea and summoning Servants, who as ever instinctively knew what their purpose was: to gather all of the pieces, one way or another, and recreate the Grail where they had tried to perform the ritual... in a small town, in the middle of nowhere, in Gifu Prefecture. As for the pieces? Well, each Servant summoned got precisely one...
Of course, with the grail overcharged and one of the Imperial Regalia acting as an overriding catalyst, it is entirely unsurprising all of the Servants summoned are themselves Japanese, or that there are so many.
So, as stated above, this is a Grail War where the aim is actually not necessarily to kill literally every other participant, but rather to get all of the pieces of the Grail in some way or another. All Servants are Japanese, and extra classes are permitted on a case by case basis (Ruler, for instance, is probably out entirely because of its inappropriate role here, Amakusa would have to be something else.)
Sheets:
Magi being a group that could recognise a useful idea but not the potential downsides, it was almost inevitable that some would take the bright idea of trying to literally carve out the useful parts, force it into a more useful shape, and make a new one. Because if the idea was sound and you couldn't do a better one yourself, why not copy it? Wanting to avoid the disastrous "war" step, however, they sought out another source to try and power it, stealing from the Ise Grand Shrine... and managing to put the Yata no Kagami to use.
This did not work according to plan. Trying to drive something, in the end, created by a homunculus known as the Archmage of Winter using a divine artefact of the Sun Goddess was surprisingly incompatible, and although more than enough power was gathered, the entire thing blew up in their faces. Literally.
The shards of the grail reemerged unexpectedly over time, with the grail ritual seeming to have started itself: Masters intentionally or unintentionally catching wind of the idea and summoning Servants, who as ever instinctively knew what their purpose was: to gather all of the pieces, one way or another, and recreate the Grail where they had tried to perform the ritual... in a small town, in the middle of nowhere, in Gifu Prefecture. As for the pieces? Well, each Servant summoned got precisely one...
Of course, with the grail overcharged and one of the Imperial Regalia acting as an overriding catalyst, it is entirely unsurprising all of the Servants summoned are themselves Japanese, or that there are so many.
So, as stated above, this is a Grail War where the aim is actually not necessarily to kill literally every other participant, but rather to get all of the pieces of the Grail in some way or another. All Servants are Japanese, and extra classes are permitted on a case by case basis (Ruler, for instance, is probably out entirely because of its inappropriate role here, Amakusa would have to be something else.)
Sheets:
