They are only available during special summoning campaigns. When no such campaigns are active, this Servant cannot be summoned.
This article is about 4★
Mysterious Heroine XX (Alter). For other variations, see Artoria (Disambiguation).

Japanese Name: 謎のヒロインXX〔オルタ〕 | |
AKA:AKA: Heroine XX AlterHeroine XX Alter, MHXXA | |
ID: 423 | Cost: 12 |
ATK:ATK: 1,600/9,603 | HP:HP: 1,947/12,171 |
Lv.100 Grail ATKLv.100 Grail ATK: 11,627 | Lv.100 Grail HPLv.100 Grail HP: 14,757 |
Lv.120 Grail ATKLv.120 Grail ATK: 13,652 | Lv.120 Grail HPLv.120 Grail HP: 17,344 |
Voice Actor: Kawasumi Ayako | Illustrator: BUNBUN |
Attribute: Star | Growth Curve: S |
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Alignments: Chaotic・Evil |
Gender: Female | |
Basic Traits: Arthur, Artoria Face, Dragon, Enuma Elish Nullification, Existence Outside the Domain, Hominidae Servant, Humanoid, King, Round Table Knight, Servant, Spaceflight-able Servant, Summer Mode Servant | |
Hits: ![]() ![]() ![]() ![]() |
Active Skills | Passive Skills | Append Skills | Noble Phantasm | Ascension |
Skill Upgrade | Stats | Bond Level | Biography | Trivia |
Active Skills
Available from the start |
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![]() Increases own attack for 3 turns. Gains critical stars every turn for 3 turns. Gains critical stars. | ||||||||||
Level | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
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10% | 11% | 12% | 13% | 14% | 15% | 16% | 17% | 18% | 20% |
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5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 15 |
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5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 15 |
Cooldown | 9 | 8 | 7 |
Unlocks after 1st Ascension |
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Increases own Buster performance for 3 turns. Increases own star absorption of ![]() Increases own critical damage for 3 turns. | ||||||||||
Level | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
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20% | 21% | 22% | 23% | 24% | 25% | 26% | 27% | 28% | 30% |
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300% | 320% | 340% | 360% | 380% | 400% | 420% | 440% | 460% | 500% |
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20% | 21% | 22% | 23% | 24% | 25% | 26% | 27% | 28% | 30% |
Cooldown | 8 | 7 | 6 |
Unlocks after 3rd Ascension |
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![]() ![]() (The amount of NP charged is multiplied by the number of enemies.) Charges own NP gauge. Increases own NP generation rate for 3 turns. | ||||||||||
Level | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
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10% | 11% | 12% | 13% | 14% | 15% | 16% | 17% | 18% | 20% |
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20% | 21% | 22% | 23% | 24% | 25% | 26% | 27% | 28% | 30% |
Cooldown | 9 | 8 | 7 |
Passive Skills
1 | ![]() |
Existence Outside the Domain D |
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2 | ![]() |
Mad Enhancement C |
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3 | ![]() |
Magic Resistance B |
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4 | ![]() |
Altereactor A+ |
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- | ||
Reach Bond Level 15 | ||
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Guidance of the Visionary Flames | |
![]() (Stackable, This passive will not trigger if the owner is a Support Servant.) |
Append Skills
Unlocks by consuming Servant Coins |
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Extra Attack Finesse Improvement | |||||||||
Increases own Extra Attack performance. | ||||||||||
Level | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
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30% | 32% | 34% | 36% | 38% | 40% | 42% | 44% | 46% | 50% |
Unlocks by consuming Servant Coins |
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Mana Loading | |||||||||
Starts battle with NP gauge charged. | ||||||||||
Level | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
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10% | 11% | 12% | 13% | 14% | 15% | 16% | 17% | 18% | 20% |
Unlocks by consuming Servant Coins |
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Anti-Assassin Attack Damage Aptitude | |||||||||
Increases own attack against ![]() | ||||||||||
Level | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
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20% | 21% | 22% | 23% | 24% | 25% | 26% | 27% | 28% | 30% |
Unlocks by consuming Servant Coins |
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Special Attack Finesse Improvement | |||||||||
Increases own critical damage. | ||||||||||
Level | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
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20% | 21% | 22% | 23% | 24% | 25% | 26% | 27% | 28% | 30% |
Unlocks by consuming Servant Coins |
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Skill Reloading | |||||||||
Reduces activated skill cooldown by 1 for N times. (Only once per skill) (N: Based on Skill Level.) | ||||||||||
Level | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
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1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 |
Noble Phantasm
![]() Base Damage: x1.5 |
Rank | Noble Phantasm Type | |||
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A+ | Anti-Unit | ||||
Hits | Per Hit Percentage | ||||
7 | 3%, 7%, 10%, 14%, 17%, 21%, 28% | ||||
Effect | ![]() ![]() Deals damage to one enemy. ![]() ![]() ![]() ![]() ![]() | ||||
NP Level | 1 | 2 | 3 | 4 | 5 |
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600% | 800% | 900% | 950% | 1000% |
Overcharge Effect | Increases own NP damage for 1 turn. (Activates first)(Activates first) | ||||
Charge | 100% | 200% | 300% | 400% | 500% |
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10% | 15% | 20% | 25% | 30% |
Ascension
n° | Item 1 | Item 2 | Item 3 | Item 4 | QP |
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1st | ![]() |
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2nd | ![]() |
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3rd | ![]() |
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4th | ![]() |
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Skill Reinforcement
n° | Item 1 | Item 2 | Item 3 | Item 4 | QP |
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1st | ![]() |
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2nd | ![]() |
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3rd | ![]() |
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4th | ![]() |
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5th | ![]() |
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6th | ![]() |
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7th | ![]() |
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8th | ![]() |
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9th | ![]() |
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n° | Item 1 | Item 2 | Item 3 | Item 4 | QP |
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1st | ![]() |
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2nd | ![]() |
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3rd | ![]() |
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4th | ![]() |
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5th | ![]() |
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6th | ![]() |
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7th | ![]() |
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8th | ![]() |
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9th | ![]() |
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Stats
Strength:Strength: A+![]() |
Endurance:Endurance: A+![]() |
Agility:Agility: C+![]() |
Mana:Mana: C![]() |
Luck:Luck: E-![]() |
NP:NP: A+![]() |
Bond Level
Bond Level | 1 ![]() |
2 ![]() |
3 ![]() |
4 ![]() |
5 ![]() |
6 ![]() |
7 ![]() |
8 ![]() |
9 ![]() |
10 ![]() |
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Bond Required | 3,000 | 6,125 | 6,125 | 6,125 | 6,125 | 262,500 | 290,000 | 300,500 | 309,500 | 315,000 |
Total Bond | 3,000 | 9,125 | 15,250 | 21,375 | 27,500 | 290,000 | 580,000 | 880,500 | 1,190,000 | 1,505,000 |
Rewards | ![]() |
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Bond 10 Craft Essence | ![]() |
Trickmaster When equipped on Mysterious Heroine XX (Alter): ![]() ![]() while self is on the field. | ||||||||
![]() Chaldean Visionary Flames [?][?] |
11 ![]() |
12 ![]() |
13 ![]() |
14 ![]() |
15 ![]() | |||||
1,090,000 | 1,230,000 | 1,360,000 | 1,500,000 | 1,640,000 | ||||||
2,595,000 | 3,825,000 | 5,185,000 | 6,685,000 | 8,325,000 | ||||||
Rewards | ![]() ![]() |
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Biography
“ 砕けぬ我が心、アズキボーの如し。
夏の終わりの蜃気楼────蒼輝銀河最極ヴィラン! ”
夏の終わりの蜃気楼────蒼輝銀河最極ヴィラン! ”
Unlock | Description | Translation🛈🛈 |
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Default | ||
Bond 1 | ||
Bond 2 | ||
Bond 3 | ||
Bond 4 | ||
Bond 5 | ||
Clear Celeb Summer Experience! & Bond Lvl 5 | ||
Extra |
Availability
Mysterious Heroine XX (Alter) was available for summoning during the
Archetype Inception Summoning Campaign |
Recommended Servants
Traits | Servants with Special Damage |
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Arthur | ![]() ![]() |
Artoria Face | ![]() ![]() |
Dragon | ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Female | ![]() ![]() ![]() ![]() ![]() |
Humanoid | ![]() ![]() ![]() ![]() |
King | ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Round Table Knight | ![]() ![]() ![]() |
Servant | ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]()
|
Attributes | Servants with Special Damage |
Star | ![]() ![]() ![]() ![]() ![]() |
Alignments | Servants with Special Damage |
Chaotic | ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Evil | ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Guide | ![]() ![]() ![]() ![]() ![]() |
For other effects see status effects. |
Trivia
Change History
Released in August 28, 2024
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5 ★ | ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
4 ★ | ![]() ![]() ![]() ![]() |