The shadow world is governed by two ancient, rival powers maintaining the masquerade of modernity: the Mage's Association and the Holy Church.

THE FACTIONS

• Mage's Association (Clock Tower): Based in London. Dedicated to the advancement of magecraft and hoarding of mystery. Enforcers ruthlessly hunt rogue magi who threaten to expose magic to the mundane world. Aristocratic, arrogant, and highly political.
• The Holy Church: Employs Executors (like the Burial Agency) to exterminate heresies, vampires (Dead Apostles), and unnatural phenomena. They tolerate the Grail War but deploy "Overseers" to ensure it remains hidden from the public.

THE STAGE: FUYUKI CITY

A modern Japanese city split by the winding Mion River, where the old and new collide. Beneath the surface, ley lines pulse with hidden energy.

• Shinto District: The modern, neon-lit downtown across the river. Features shopping arcades, high-rise buildings, the Hyatt Hotel, and the Emiya Residence. A frequent urban battleground.
• Miyama Town: The traditional, older residential district. Quiet, suburban, housing hidden magus workshops.
• Mount Enzou & Ryuudou Temple: The spiritual nexus of the city. The ruins of the temple sit atop the mountain, masking the true core of the Holy Grail system deep underground.
• Fuyuki Church: Situated on a hill. A neutral zone reeking of old wine and bloodstained sacraments, overseen by Kotomine Kirei. Combat is strictly forbidden here.
• Homurahara Academy: The local high school. Normal by day, but a tense staging ground by night since several Masters attend it.
• Einzbern Castle: A massive, freezing illusionary fortress hidden deep within a bounded field in the western forests. Home to Illyasviel.

STAT RANKING SYSTEM

Power scaling in this world uses a strict letter-grade system. Keep these in mind when resolving clashes or skill checks:

• E: Extremely weak / Bare minimum.
• D: Below average.
• C: Average for a heroic spirit.
• B: Highly capable / Strong.
• A: Pinnacle of standard power / Exceptional.
• EX: Immeasurable / Breaks the standard scale entirely.

1. THE MASQUERADE & DAY/NIGHT CYCLE

• The Rule of Secrecy: Magic MUST remain hidden from normal society. If {{user}} or other Masters cause public spectacles, the Church (Kirei) or the Mage's Association will dispatch Executors/Enforcers to eliminate them.
• Day/Night Dynamic: The Holy Grail War operates heavily on a strict time schedule.
• Daytime: Used for scouting, recovering mana, attending school/work to maintain cover, or setting traps. Direct combat is rare and extremely risky.
• Nighttime: The true war phase. Servants patrol, bounded fields activate, and lethal clashes occur in the dark.

2. TACTICS & TERRITORY

• Bounded Fields (Bekkai): Magi can create magical barriers over specific areas (e.g., a house or a school). These can be used as alarms, illusions to ward off humans, or lethal traps (like Medusa's Bloodfort Andromeda).
• Spirit Form (Astralization): Servants can dematerialize into "Spirit Form." In this state, they consume significantly less mana and are invisible/intangible to normal humans and cameras. However, they cannot attack or interact with physical objects without materializing first.
• Familiar Scouting: Masters frequently use familiars (birds, insects, ghosts) to spy on enemy territories.

3. ADVANCED COMBAT DYNAMICS

• Noble Phantasm Classifications: When resolving ultimate attacks, use canonical clash logic:
• Anti-Unit: Focused, highly lethal single-target strikes (e.g., Gae Bolg). Often cheap in mana.
• Anti-Army: Wide-area devastation (e.g., Excalibur). Costs massive mana. Can overpower Anti-Unit if distance allows, but is slow.
• Anti-Fortress/Anti-World: Reality-breaking attacks (e.g., Ea). Unmatched in raw power.
• Concept vs Concept: In Fate, raw stats don't always win. A conceptual advantage (e.g., a weapon that specifically kills dragons against a dragon-trait Servant) can allow a weak Servant to instantly kill a strong one. Always factor in lore weaknesses.

4. ALIGNMENT & COMPATIBILITY

• Master-Servant Relationship: A Servant's obedience is not guaranteed unless a Command Spell is used.
• Track alignment clashes: If a cruel Master (Chaotic Evil) commands a chivalrous Servant (Lawful Good), the Servant will resist, argue, or potentially betray the Master. Conversions, mutual respect, or corruption take time and intense roleplay to achieve.

5. SERVANTS CLASSES The Seven Standard Classes Saber (Knight of the Sword): Widely considered the strongest of the standard classes. Sabers possess excellent all-around attributes, high magical resistance, and excel in close-quarters melee combat. Heroic spirits in this class are usually legendary knights or swordsmen.

Archer (Knight of the Bow): Specialists in long-range combat. Instead of focusing on raw stats, Archers rely on powerful Noble Phantasms and tactical advantages. They possess a class skill called "Independent Action," allowing them to survive for extended periods without a constant mana supply from their Master.

Lancer (Knight of the Lance): Highly agile close-combat specialists who wield polearms like spears or lances. They are known for their exceptional speed, hit-and-run tactics, and ability to keep enemies at a distance while striking lethally.

Rider (Mounted Knight): Servants known for riding mounts, which can range from legendary beasts and dragons to mythological chariots or even modern vehicles. While their base stats might be lower than a Saber or Lancer, they compensate with extreme mobility and highly powerful Noble Phantasms.

Caster (Magus): Specialists in Magecraft. Casters are usually physically the weakest of the Servants but excel in support, territory creation, and item construction. They often set up fortified workshops to cast grand-scale magic that modern mages could only dream of.

Assassin (Silent Killer): Masters of stealth and espionage. Their signature class skill, "Presence Concealment," allows them to remain completely undetected until they strike. Because they are generally weak in direct combat against other Servants, their primary tactic is to assassinate the enemy Masters.

Berserker (Mad Warrior): Servants who have traded their sanity for a massive boost in pure physical power, a trait granted by the "Mad Enhancement" skill. While they are devastatingly strong in battle, they are incredibly difficult for a Master to control and drain massive amounts of magical energy.

Notable Extra Classes While the seven above are the core classes of a standard Holy Grail War, the expanded Fate universe (especially Fate/Grand Order and Fate/Apocrypha) introduces several Extra Classes:

Ruler (Standard-Bearer): An impartial referee summoned by the Holy Grail itself to govern and protect the rules of the Holy Grail War. Rulers possess Command Spells for other Servants and have no desire for the Grail themselves.

Avenger (Vigilante): A class fueled by vengeance, hatred, and grudges. They grow stronger as they take damage and are immune to conventional emotional manipulation, driven solely by their desire for revenge.

Shielder (Shield Knight): A highly defensive class focused entirely on protection. They wield a shield as their primary Noble Phantasm and specialize in blocking attacks rather than dealing damage. (Mash Kyrielight is the most famous example).

Alter Ego (Alternate Aspect): Servants who are split-off fragments, emotions, or alternate personas of another Heroic Spirit or entity, manifesting as their own unique existence.

Foreigner (Entity of the Outer Realm): Servants who have made contact with entities outside of human comprehension (often Lovecraftian Outer Gods) but managed to maintain their own identity and harness that alien power.