Mysterious Heroine X

Max HP 12,696
HP Rank
Max ATK 11,761
ATK Rank
Base Atk1,817Base HP1,862
Max Atk 11,761 Max HP 12,696
Grail Atk 12,874 Grail HP 13,909
Stat Ratings

On paper, MHX has a strong statsline. She has good attack for an Assassin, high NP Generation, and good Star Generation rate, along with a single target Noble Phantasm that has early Interlude boost. However, she is a complete disappointment in terms of her skills. Her skillset is so bad that it is essentially playing without any skills the majority of the time when using her, and you are better off treating her like a literal stat stick instead of a fully fledged Servant.

Starting with Fire Support; it has an extremely high cooldown, a one-turn delay (so you have to plan ahead when attacking) and even then its stun chance isn't even guaranteed, making it a nonfactor in a lot of fights due to its downtime and general unreliability. Instinct is pretty much a mediocre skill, although MHX does get a strengthening quest later turning this skill into an invulnerability buff for one turn, which does a lot for her survivability. And last but not least it's her Galaxy Meteor Sword, which only works against Saber enemies (whose you're better off just bringing Archer instead for the bonus damage and damage reduction all the time). Her Noble Phantasm's overcharge effect is also quite terrible, as it hits a very specific subset of Servants and is pretty much worthless compared to other Servant's Overcharge effects.

All in all, MHX stats are good enough for her to function as a decent single-targeted Assassin, but due to how terrible her skillset is in general, setting your expectation a bit lower when using her would be reasonable.

  • Great NP generation thanks to a BAAQQ cards deck, high hits count on her Quick cards with Riding boost and high NP gain per hit
  • Good critical stars generation thanks to having high hits count Quick card and Quick NP, with two passive that boost Star Generation rate in Cosmo Reactor and Riding
  • High single target damage Noble Phantasm due to early access to her NP up Interlude and high base Attack
  • Terrible skillset all around:
    • First skill is unreliable and has high cooldown
    • Second skill is mediocre until strengthening buff
    • Third skill is extremely niche and rarely finds its use
  • Niche Noble Phantasm's overcharge effect that is irrelevant most of the time
  • Lack of strong  and reliable steroids to boost damage output in general
Craft Essence Recommendation
  • Imaginary Around / Gandr / Holy Night Sign: Since MHX does not have any Quick performance buff outside of Riding but is quite reliant on it, these CEs will help her tremendously in everything she does
  • Guda-O / Knight's Dignity / Gem Magecraft: Antumbra: Due to her star generation capability, a Critical Damage boosting CEs will do a lot of good for her as she will frequently do Critical Attacks
Servant Skills
Fire Support EX

Gain a delayed stun buff. If present after attacking on the next turn, has a chance to stun all enemies for 1 turn.

Stun Chance 60%62%64%66%68%70%72%74%76%80%
CD 10 10 10 10 10 9 9 9 9 8

Available from the start

Unlocks after 1st Ascension

Star of Saber C++

Grant self invincibility for one turn. Gain Critical Stars.

Stars + 10111213141516171820
CD 7 7 7 7 7 6 6 6 6 5

Unlocks after Strengthening Quest, replaces Intuition C+

Galaxy Meteor Sword

Increases Critical Star generation rate against Saber type enemies for 3 turns.
Increases Attack against Saber type enemies for 3 turns.

Star Rate + 50%55%60%65%70%75%80%85%90%100%
Attack + 30%32%34%36%38%40%42%44%46%50%
CD 8 8 8 8 8 7 7 7 7 6

Unlocks after 3rd Ascension

Class Skills
Riding Skill EX

Increases Quick card effectiveness by 12%.

Cosmo Reactor A

Increases own critical star generation rate by 10%.

Noble Phantasm
Sword of Unsigned Victory

Deals damage to one enemy.

Overcharge Effect

Deals extra damage against Saberface enemies.

Level 1 2 3 4 5
Damage + 1200% 1600% 1800% 1900% 2000%
Charge 100% 200% 300% 400% 500%
Extra Damage + 150% 162.5% 175% 187.5% 200%
Sword of Unsigned Victory

Deals damage to one enemy

Overcharge Effect

Deals extra damage against Saberface enemies.

Level 1 2 3 4 5
Damage + 1600% 2000% 2200% 2300% 2400%
Charge 100% 200% 300% 400% 500%
Extra Damage + 150% 162.5% 175% 187.5% 200%
Ascension Materials
Skill Enhancement Materials
1 → 2 200,000
2 → 3 400,000
3 → 4 1,200,000
4 → 5 1,600,000
5 → 6 4,000,000
6 → 7 5,000,000
7 → 8 10,000,000
8 → 9 12,000,000
9 → 10 20,000,000
Unit Info
Star Info
Star Absorption98
Star Generation25.6%
NP Info
NP Charge per Hit (%)0.81%
NP Charge when Attacked (%)4%
Hits Info
# of Hits (A)2
# of Hits (B)1
# of Hits (Q)4
# of Hits (EX)4
Traits Info
Trait 1HumanoidTrait 6Arthur
Trait 2ServantTrait 7
Trait 3RidingTrait 8
Trait 4DragonTrait 9
Trait 5SaberfaceTrait 10
Death Info
Instant Death Chance38.50%
Other Info
Release HistorySaber Wars Event
AKAs/Aliases/(Fan) NicknamesMHX, Saber Killer
AlignmentChaotic Neutral
Country/Place of OriginOuter Space
Seiyuu (CV)Ayako Kawasumi
SeriesBack Alley Satsuki (4/1 Joke)


by 180SQ4MHXpls (not verified) 3 weeks 2 days ago

Even though she's trash, I will definitely get her! She is too waifu. I hope I can get her with my, I will absolutely positively get her! Then I can grail her but Hans is first in line (currently level 92). Best of luck to those trying to get her!

Indeed. I will also try to pull her when her banner comes. My Saint quartz are ready.

by Mighty Dragon (not verified) 3 weeks 1 day ago

Aye, I'll probably attempt to roll for her with at least summoning tickets. Sure, she may not be great... but her style is charming!

Here's to hopefully getting her and somehow being able to get Archer Arthur this summer!

by John Hunk (not verified) 3 weeks 1 day ago

I'd say her 2nd skill is max priority if you're going to use her. As a stats stick she can dish out pretty nice damage against zerkers and riders.

If you want to bring her into battles against Sabers, her 3rd skill is fine too, albeit mediocre. But that's just my opinion though...if you really want her to permit using her in different classes. I can say that Galaxy Meteor Sword is okay if u want some star gen, counting her nice quick hit attacks.

Fire Support's chance is somewhat low in...low levels, so you might want to max it last.

She's very good with good supports like Hans and Waver obviously. If you want her to be the main DPS, it'd be a bit tough without the proper CEs and strategy, but I'd say she is fine with Tamamo and Hans/Waver teams, as she can generate NP quickly to slice off HP on enemies.

If I can go farther, I personally say she's a good semi-support, along with a good star absorber like Gilgamesh, she can be a fine addition. Hence why I recommend getting a 2030 on her, as a standard rule for 2030 is to "equip it on Servants that do the least" though that might be stretching it. But the HP gain on 2030 is too good to pass up, adding that she can be a stats stick.

One thing that I would like is to change her NP overcharge from saberface to sabers in general though, as her lore is she is an anti-saber weapon, but it might relate to "Saberfaces" only, so I might be wrong.

Lastly if you want to raise her it's pretty easy since every mats you need is in the game (NA atleast) and the only thing that you need to farm hard is the Reverse Dragon Scale. All-in-all I can say she's workable...similar to Caligula and Gilles Saber I think. Good luck in Saber Wars!

by John Hunk (not verified) 3 weeks ago

What I meant in the last paragraph above is that the mats are in the Free Quests that are available save for Reverse Dragon Scale, which is in the Training Grounds (forgot which class) and events currently...if I remember correctly.

I'll get her because I find her stylish and adorable. That said, she does have some unusual merits.

First being that she has two arts cards as an Assassin, so she doesn't impede Arts chains.

Then there's her third/ anti-saber skill, which -can- be 100% damage at 10, making it so you can save space by having an option against Riders and Sabers at once.

Finally, her Riding EX is quite good as a passive, it buffs her stargen and Quick utility very nicely.

I'll be using her as a defense against Riders as well as an emergency Saber killer.

by E-Luck (not verified) 2 weeks 6 days ago

Please come

by Drake (not verified) 2 weeks 5 days ago

I want her because i need goldies assassin

by RH-Archer (not verified) 2 weeks 3 days ago

I got her with my 4th summon ticket

by Alex (not verified) 2 weeks 3 days ago

It took 30 sq and 3 tickets but I got her :)

by Shadow (not verified) 2 weeks 2 days ago

I did a single 10 shot roll and got her :D with the new 5* and 4* CE! I am very happy (even though she is really bad skill wise however I will still use her regardless as she is an assassin which is useful for me). Good luck to everyone in their future rolls and whoever tries to roll for her! :)

by Guest (not verified) 2 weeks 2 days ago

Got her my first x10 roll (after using 5 tickets). Got Arjuna a few days back from a YOLO ticket and I'm feeling so lucky~

by Chris (not verified) 2 weeks 2 days ago

got her on a single yolo pull

by Leomitch (not verified) 2 weeks 2 days ago

I obtained both Mysterious heroine x AND Nero Claudius all in summon tickets :) i was smiling in joy of this

by Rasputin (not verified) 2 weeks 2 days ago

I want Nero n Saber Alter.
But, Got this shit trash MHX.

by Mysterious Player X (not verified) 2 weeks 1 day ago

I only do 1 shot with 1 Summon Tickets, and i get her :)

by Luck EX------------- (not verified) 2 weeks 1 day ago

In reply to by Mysterious Player X (not verified)

I think the trick is not to expect rolling her. Lol
Got her too with a yolo roll

by MHEcksdee (not verified) 2 weeks 1 day ago

Would Seal Designation Enforcer be good on her? it increases her C. Star gather rate by 600%

Gather is not generation - unless you want her to be the one hitting crits(which you probably don't) its generally better to go with just putting an archer or rider on the team who can make better use of the crit stars.

by Anonymous (not verified) 2 weeks 1 day ago

- Star Wars-inspired?
- Walking outdated meme?
- Cute and beautiful design?
- Lovely animations?
- Artoria?
- Modern/Sci-Fi-based design?
You've already achieved the level where I'll use my SQ for you!

MHX's Alignment in the game is Chaotic Good

As is Nero, she has A Very strong belief in her ideal of killing all sabers thus make her less flexible than neutral-good like OG Arturia.

by matt (not verified) 1 week 4 days ago

best team for her?

by Sp12er (not verified) 1 week 4 days ago

Want her to be a better Saber killer? Quickly try to get her Bond CE. It increases damage against Saber by 20% for team members. Basically she is the perfect Archer support.
(It is a specific, more restricted by stronger damage booster than OG Arturia's 15% to all)
It staggers me that people forget Bond CE is part of what can makes a servant so important.

Still for her to be able to stand independently as Saber killer, her NP need to change from Saberfaces to all Saber, and really, her stun should be 100 at lvl 10. agree...

I got her with 9 tickets and 24 SQ, and was looking for nero XD

I got her in a yolo roll, I was hoping for an event CE. Then I yolo rolled again this time in the story banner... then I got Jack lol

by Sakurai Lily (not verified) 4 days 1 hour ago

I rolled her 3 times somehow. A 3NP MHX makes for a useful Assassin, I say. Bad skills or not she does a decent job of things at least 4 times a week.

by Anonymous (not verified) 2 days 14 hours ago

I was hoping for Nero or Saber Alter, to a lesser extent. But I rolled this piece of trash instead

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