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Bryn2 This Servant is a Limited Servant Limited. They are only available during special summoning campaigns. When no such campaigns are active, this Servant cannot be summoned.
This article is for Class-Assassin-Gold Mysterious Heroine X. For 5★ Class-Berserker-Gold, see Mysterious Heroine X (Alter). For 4★ Class-Foreigner-Gold see Mysterious Heroine XX.
For 5★ Class-Saber-Gold, see Artoria Pendragon.
ServantDialogueInterludeStrengthen
Class-Assassin-Gold
★ ★ ★ ★ ★

Mysterious Heroine X

Japanese Name: 謎のヒロインX
AKA: MHX, A-X, Mysterious Racer X (Summer Event)
ID: 86 Cost: 16
ATK: 1,817/11,761 HP: 1,862/12,696
Grail ATK: 12,874 Grail HP: 13,909
Voice Actor: Kawasumi Ayako Illustrator: BUNBUN
Attribute: Star Growth Curve: Linear
Critabsup Star Absorption: 98 Stargainup Star Generation: 25.6%
Npchargeup NP Charge ATK: 0.81% NPGainUpDmg NP Charge DEF: 4%
Instapowerup Death Rate: 38.5% Alignments: Chaotic・Good
Gender: Female
Traits: Arthur, Dragon, Female, Humanoid, King, Riding, Saberface, Servant
QQAAB
Hits:  Quickicon4  |  Artsicon2  |  Bustericon1  |  Extraicon4
Active Skills Passive Skills Noble Phantasm Ascension Skill Upgrade
Stats Bond Level Biography Trivia Images

Active Skills

Available from the start
Stun
Fire Support EX
DelayedBuff Gains delayed buff for 1 turn.
Chance to Stun all enemies for 1 turn after 1 turn.
Level 12345678910
Stunstatus Stun Chance + 60% 62% 64% 66% 68% 70% 72% 74% 76% 80%
Cooldown 10 98

Upgrades after Strengthen 2, Replace Fire Support EX
Stun
Fire Support XEX EX
Reduce all enemies defense for 3 turns. UpgradeIconText
DelayedBuff Gains delayed buff for 1 turn.
Chance to Stun all enemies for 1 turn after 1 turn.
Level 12345678910
Defensedown Defense - 10% 11% 12% 13% 14% 15% 16% 17% 18% 20%
Stunstatus Stun Chance + 60% 62% 64% 66% 68% 70% 72% 74% 76% 80%
Cooldown UpgradeIconText 9 87

Unlocks after 1st Ascension
CritStar
Instinct C+
Gains critical stars.
Level 12345678910
GainStars Stars + 4 5 6 7 8 9 10 11 12 14
Cooldown 7 65

Upgrades after Strengthen 1, Replace Instinct C+
Invishield
Star of Saber C++
Invincible Grants self Invincibility for 1 turn. UpgradeIconText
Gains critical stars. UpgradeIconText
Level 12345678910
Stars + 10 11 12 13 14 15 16 17 18 20
Cooldown 7 65

Unlocks after 3rd Ascension
CritGen
Galaxy Meteor Sword C
Increases own critical star generation rate against Class-Saber-Gold Saber enemies for 3 turns.
Increases own damage against Class-Saber-Gold Saber enemies for 3 turns.
Level 12345678910
Stargainup Saber Star Rate + 50% 55% 60% 65% 70% 75% 80% 85% 90% 100%
Powerup Saber Damage + 30% 32% 34% 36% 38% 40% 42% 44% 46% 50%
Cooldown 8 76

Upgrades after Saber Wars II, Replace Galaxy Meteor Sword C
CritGen
Galaxy Meteor Sword XEX A
Increases own critical star generation rate against Class-Saber-Gold Saber enemies for 3 turns.
Increases own damage against Class-Saber-Gold Saber enemies for 3 turns.
Increases own attack for 3 turns. UpgradeIconText
Level 12345678910
Stargainup Saber Star Rate + 50% 55% 60% 65% 70% 75% 80% 85% 90% 100%
Powerup Saber Damage + 30% 32% 34% 36% 38% 40% 42% 44% 46% 50%
Attackup Attack + 10% 11% 12% 13% 14% 15% 16% 17% 18% 20%
Cooldown 8 76

Passive Skills

1
Riding
Riding EX
Quickupstatus Increases own Quick performance by 12%.
2
CritGen
Cosmo Reactor A
Stargainup Increases own critical star generation rate by 10%.

Noble Phantasm

Secret-Calibur
Sword of Unsigned Victory
Rank Classification Type Hit-Count
A+ Anti-Unit Quick 12
Effect Deals damage to one enemy. PreUpgradeIconTitle
NP Level 1 2 3 4 5
Powerup Damage + 1200% 1600% 1800% 1900% 2000%
Overcharge Effect Deals extra damage against Saberface enemies.
Charge 100% 200% 300% 400% 500%
Powerup Extra Damage + 150% 162.5% 175% 187.5% 200%

Upgrades after Interlude 3
Secret-Calibur
Sword of Unsigned Victory
Rank Classification Type Hit-Count
EX Anti-Unit Quick 12
Effect Deals damage to one enemy. UpgradeIconText
NP Level 1 2 3 4 5
Powerup Damage + 1600% 2000% 2200% 2300% 2400%
Overcharge Effect Deals extra damage against Saberface enemies.
Charge 100% 200% 300% 400% 500%
Powerup Extra Damage + 150% 162.5% 175% 187.5% 200%

謎のヒロインX 無銘勝利剣

謎のヒロインX 無銘勝利剣

謎のヒロインX宝具 無銘勝利剣(ひみつかりばー) Fate Grand Order FGO Noble Phantasm

謎のヒロインX宝具 無銘勝利剣(ひみつかりばー) Fate Grand Order FGO Noble Phantasm

Ascension

Item 1 Item 2 Item 3 Item 4 QP
1st Assassin piece5 QPicon100,000
2nd Assassin piece12 Dragon fang18 QPicon300,000
3rd Assassin monument5 Dragons reverse scale2 Phoenix plume8 QPicon1,000,000
4th Assassin monument12 Dragons reverse scale4 Heros proof36 QPicon3,000,000
Costume 1
MHXCostume1Icon
Heros proof10 Aurora Steel5 DawnlightReactorCoreIcon5 Dragons reverse scale5 QPicon3,000,000


Skill Reinforcement

Item 1 Item 2 Item 3 Item 4 QP
1st Shiningassassin5 QPicon200,000
2nd Shiningassassin12 QPicon400,000
3rd Magicassassin5 QPicon1,200,000
4th Magicassassin12 Phoenix plume4 QPicon1,600,000
5th Secretassassin5 Phoenix plume8 QPicon4,000,000
6th Secretassassin12 Dragon fang12 QPicon5,000,000
7th Voids refuse12 Dragon fang24 QPicon10,000,000
8th Voids refuse36 Octuplet twin crystals24 QPicon12,000,000
9th Crystallized lore1 QPicon20,000,000

Stats

Strength: B
Stats4
Endurance: C
Stats3
Agility: A+
Stats5
Mana: B
Stats4
Luck: D
Stats2
NP: A++
Stats5

Bond Level

Bond Level 1 BoundLevel1 2 BoundLevel2 3 BoundLevel3 4 BoundLevel4 5 BoundLevel5 6 BoundLevel6 7 BoundLevel7 8 BoundLevel8 9 BoundLevel9 10 BoundLevel10
Bond Required 3,500 8,500 7,000 6,000 2,500 292,500 360,000 340,000 320,000 315,000
Total Bond 3,500 12,000 19,000 25,000 27,500 320,000 680,000 1,020,000 1,340,000 1,655,000
Bond 10 Reward Annihilation List icon Annihilation List
When equipped on Mysterious Heroine X,
Increase Party's damage to Saber enemies by 20% while she is on the field.
BoundLevel15
Chaldean Visionary Flames [?]
11 BoundLevel1 12 BoundLevel2 13 BoundLevel3 14 BoundLevel4 15 BoundLevel5
1,090,000 1,230,000 1,360,000 1,500,000 1,640,000
2,745,000 3,975,000 5,335,000 6,835,000 8,475,000


Biography

Unlock Description Translation
Default サーヴァントユニヴァースと呼ばれる謎の時空から来訪したストレンジャー。

自らをセイバークラスの決定版と名乗り、騎士として正々堂々と闇討ちを行う対セイバー用決戦兵器。

コードネーム・A-X。

A Stranger that came visiting from a mysterious dimension called Servant Universe.

Claiming to be the definitive edition of the Saber Class, an Anti-Saber Decisive Weapon that fair and square performs surprise attacks as a knight.

Code Name: A-X.

Bond 1 身長/体重:154cm・42kg

出典:2013年エイプリルフール
地域:サーヴァント界
属性:混沌・善  性別:女性
なぞのまけん『ひみつかりばー』でてきをみなごろしにするぞ。

Height/Weight: 154cm・42kg

Source: 2013's April Fools
Region: Servant Universe
Alignment: Chaotic・Good
Gender: Female
Going to massacre the enemy with the mysterious magic sword "Secret-Calibur".

Bond 2 「アルトリア種は宇宙のガンのようなもの。誰かが刈り取らねばならないのです。誰かが」

苦渋に満ちた表情でそう残し、ヒロインXは故郷を後にした。
愛機ドゥ・スタリオンⅡ号は今日も星の海を駆ける。

"The Artoria Species are like a cancer of the universe. Someone has to reap them out."

Leaving behind an expression full of bitterness, Heroine X departed from her hometown.
In her favorite machine Dun Stallion II, she dashes across the sea of stars today as well.

Bond 3 その姿はおおよそサーヴァントらしからぬラフ&スポーティな服装。

青いマフラーは勇気の印、帽子はその正体とアホ毛を隠すためのものである。
突き出てる突き出てるめっちゃ突き出てる。

On the whole, her appearance is composed of rough & sporty garments unseemly for Servants.

The blue muffler is a symbol of courage, while the cap is there to conceal her true identity and ahoge.
It's sticking out. It's sticking out, it's really sticking out.

Bond 4 対セイバー決戦兵器として、並み居るセイバーをひたすら打倒する我はこの一聖剣に賭ける修羅モードであるが、唯一セイバーリリィに対しては心を開いた。 As an Anti-Saber Decisive Weapon, she displays a carnage mode that wagers that single holy sword for nothing but defeating all the present Sabers, but she opened her heart towards Saber Lily alone.
Bond 5 こちらにやってくるまでは古代王朝の危機を救ったり人類統合組合の内ゲバを解決したり他ユニヴァースからの侵略者たちを蹴散らしたりしていたが、そんなものは彼女にとって朝食前のデザートのようなもの。どうでもいい事なので覚えていないらしい。

真の悲願達成まで、彼女は今日もひみつかりばーを振るい続ける。あと黄金大帝コスモギルガメスは何があっても斬り捨てる。

Before coming here, she saved an ancient royal dynasty from a crisis, settled the internal strife of the Mankind Integration Union and routed the invaders from another Universe, but for her that is like a dessert prior to breakfast. Since they are trivial, it seems like she does not remember about them.

Until the achievement of her true, dearest wish, she shall continue to wield the Himitsucalibur. Also, no matter what, she will simply cut down the Golden Great Emperor Cosmo Gilgamesh.

Clear Interlude 1
Extra 誰にも打ち明けられないが、その正体はアルトリア・ペンドラゴン

完璧な変装に誰もが騙されたと思うが、ネタバレになるのでどうか黙していてほしい。
本人の名誉のためにも……!

She has not revealed to anyone, but her true identity is that of Artoria Pendragon.

She seems to think that everybody was tricked by her perfect disguise, but since it will turn into spoilers please keep it quiet.
For the sake of her honor as well...!

April Fool   Artoria-Type Servant

Of all the Servants to exist, her origin is the most mysterious. She's a mass-murdering weapon created from Artoria genes to eradicate all the Artoria-type Servants.


Availability

Mysterious Heroine X was available for summoning during the:

Saber Wars Event Fes.2017~2nd Anniversary~Lucky Bag 2018 New Year Campaign Lucky Bag
Saber Wars Event Re-run Fes.2018~3rd Anniversary~Lucky Bag New Year Lucky-Bag Summoning Campaign 2019
Fate/Grand Order Fes. 2019 ~4th Anniversary~
Lucky Bag Summoning Campaign
Saber Wars II Pre-Release Summoning Campaign

Trivia

Images

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