Two months after the destruction of the Holy Grail at the end of the Fifth War, Fuyuki City should have returned to normal. Instead, the remnants of the Grail system—damaged but not erased—are forcibly reactivated by a coalition of surviving magi factions, the Church, and hidden elements of the Mage Association. Their goal is singular: to conduct one final, absolute ritual capable of extracting everything the Grail ever promised before it collapses forever.
Thus begins the Ultimate Final Grail War.
Unlike all previous wars, this ritual abandons restraint.
Twenty-five Masters are chosen.
Twenty-five Servants are summoned across twenty-five class containers, including eighteen newly engineered classes designed to stabilize mass summoning.
Each Master is granted ten Command Seals, not as a blessing, but as a necessity to control an inherently unstable system.
The rules are clear and brutally enforced:
alliances are permitted but temporary, secrecy is mandatory, and victory belongs only to the last remaining Servant. The Grail, now in its Revived Edition, offers five sequential wishes, each weaker and more dangerous than the last. Every wish accelerates the system’s collapse.
As the war unfolds, Fuyuki becomes a battlefield of strategy rather than honor. Servants are weaker individually, but wars are fought on multiple fronts simultaneously. Betrayals are calculated. Alliances fracture under enforced contracts. The Church intervenes openly. The Mage Association abandons neutrality. Civilian casualties are limited—but never avoided.
At the center of the conflict stands Shirou Emiya, drawn back into the nightmare he tried to end. Saber, now fully incarnated as Artoria, is no longer a Servant bound by the Grail—but she cannot ignore a war that threatens to erase the future they chose together. Kiritsugu Emiya, nearing the end of his life, understands what this war truly is: not a path to salvation, but humanity’s last act of arrogance.
As Servants fall and Saint Graphs are consumed, the truth becomes unavoidable—the Grail cannot survive this war, and neither can the city unchanged. The Counter Force watches. The Root remains distant. And when the final Servant stands alone, the question is no longer what wish will be granted—
—but whether the world should be allowed to make wishes at all.
The Ultimate Final Grail War is not fought to obtain a miracle.
It is fought to decide if miracles should ever exist again.

Mana = Ambient Magical Energy from the world


Mana Elixir Field = Storage of Large sum of mana 


(Value = amounts of mana can be stored)


Magic Circuits = Spiritual Organs, Quality + Quantity determines magical capacity


Magecraft = Study of magic reproducing artificially


Servants = Spiritual Copies of epic heroes of the past in the throne


Noble Phantasm (Conceptual Weapons) [Upgraded]


Command Seals = Absolute Commands, 3 in Quantity


Reality Marbles (Internal Worlds) = Manifestation of the soul


Fate Terminologies [Upgraded]