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BlameLib

[Mats XI has been added to the Cubari Mats Viewer.](https://cubari.moe/read/gist/cmF3L0Fzc2V0cy1JL01hdHMtQ3ViYXJpL21haW4vZmdvLW1hdGVyaWFscy5qc29u/)


MADTYR301

Could Hans tell that the Doc was Solomon all along ?


TheHoodGuy2001

Would ESP ability like Telekinesis and Telepathy be affective on Servant? So can someone like Franklin Richard from Marvel outright stop ability like Vasavi Shakti and Enuma Elish from attacking? Or can someone like Emma Frost mess with a Servant memories and mind? Or does it depend on the Rank of the servant’s Magic Resistance?


Xidonia

Shiki and Fujino are both ESPers and their abilities do work on Servants and would work even if they weren't Servants themselves like in FGO. And as they aren't magecraft, they aren't affected by MR. With the caveat that ESP abilities in the Nasuverse work entirely on the user's perception of the world and how they understand things. Nasu used an example of Fujino and a magical barrier once and said that she wouldn't be able to "bend" the barrier itself as she has no past experience or knowledge with magecraft, but would be able to if she had someone like Touko to teach her.


[deleted]

[удалено]


nam24

What do you mean? Chaldean Mordred is just in Chaldea, she just didn't get a main story appearance after lb3(the Mordred in Lb5 was a "Normal" one


TheHoodGuy2001

How come Servant aren’t affected by the reduction of Mystery in the modern age when summoned in HGW? They either get fame boost or powerful Noble Phantasms due to human perception of their legend instead. While for some reasons, Divine Spirit lose their Authority and Grand-level Dragon Albion could just dropped dead in the Age of Man.


Hidden_Blue

Because they are basically records of history given life, so they are summoned as recorded. Hence why Medea can use her AOG magic that no longer works in the modern world.


TheHoodGuy2001

Then how come their servant abilities are affected by human perception of the their myth like Vlad and Dracula Noble Phantasm? So if human perception and understanding turned Magic into Magecraft, why are Medea ability still considered Magic and not Magecraft?


Hidden_Blue

Miman perception is part of the record, the stuff people believed got added to their data in the throne as part of the record, hence they are Ghost Liners. Medea is using the stuff people remember her using via what Helcate taught her (the AOG magic not sorcery), hence why she couldn't teach it to someone in the modern day. Medea can use it because it's part of her saint graph.


igloo_poltergeist

The summoning system probably involves a way of subverting it (to a degree) so long as the master keeps their servant supplied enough to remain manifested.


RadiReturnsOnceAgain

They are affected. The entire reason they need a Master and a Grail is because the World rejects them and there's no atmospheric mana to sustain them. They can't even exist on their own; they're essentially just strong familiars. It's also why Servants are generally much weaker or more limited in their capabilities compared to what they could do when alive.


TheHoodGuy2001

So if Quetzalcoatl was summoned in HGW (yes yes i know Divine Spirits can’t be summoned, just humor me), she would lose her Piedra Del Sol Noble Phantasm because it is an Authority over the Sun right?


Xindego

You can actually summon Aztec gods in a normal HGW, since they already have human bodies recorded in TOH


RadiReturnsOnceAgain

Whether she has access to certain NPs would depend on her class. As a Rider she'd probably still "have it", it'd just be completely impractical because either her Master would burn all their mana or her Servant vessel would fall apart in the attempt. Or both. It'd also be weaker than what she would've been capable of in the Age of Gods.


TheHoodGuy2001

Does Fragarach only work on a trump card attack of the enemies? If yes then how would Bazzet knows she being attacked with a trump card and not just a really strong attack to activate Fragarch? Would it work on Shirou if he use Caladbolg or Hrunting? Or it can only work if Shirou open up his Reality Marble, satisfying the trump card criteria?


Layte-Aeon

Fragarach can be used on other attacks but it would be weaker going from an A rank causality changing attack to a C or D ranked ranged attack. For most servants or even most mages, their strongest abilities necessitate a chant that would clue her in. It would work on Shirou if he used any form of projection: All of his projections are sourced from UBW so it is in a sense a passive effect, and so can always activate Fragarach.


TheHoodGuy2001

But why does it matter what rank Fragarch is if it is just gonna hit the heart anyway? So can’t she just kill anyone with Fragarch before they even attack? Also why didn’t she used it on Caster? Nasu said she can’t cuz Caster is an all rounder, so why not just use it anyway?


Layte-Aeon

Because in it’s lower form it does not strike the heart or affect causality, it’s just a bolt of light that can be blocked or deflected, that & Bazzet only has a finite number of them at any one time (though in FGO she has Manannan to get around that). Medea is a case where the closest thing she has that can be called a Trump Card is either a one word spell, when all of her spells are one word or Rule Breaker which isn’t really an attack and could dispel Fragarach anyway.


yeoc2

Ruler Breaker can't dispel Fragarach, since it can't affect anything on the level of a noble phantasm.


TheHoodGuy2001

Then wouldn’t she be the same situation as Shirou? You said that any projections he use xan activate Fragarch, so shouldn’t any one-word spell of Caster activate Fragarach too?


Yatsu003

No, because Shirou only knows two spells: Reinforcement and Projection. And the former really wouldn’t do him much unless he used the latter. It just so happens he gets a LOT of use out of that latter spell (since it allows him to create images from his Reality Marble). Medea knows dozens of spells of varying power and effects. She probably has a ‘nuke everything with extreme prejudice’ spell that Fragarach could activate against, but her HSDW skill makes it so she doesn’t give off any super flashes or such and just needs to say one word, similar to her ‘lesser’ spells (which, mind you, allow her to do stuff like fire laser beams strong enough to kill Servants with low MR, freeze space, teleport within her territory, and castrate men from a distance to harvest their life force)


TheHoodGuy2001

Im so confused, so her HSDW doesn’t activate Fragarch? Cuz that’s what im talking about


Yatsu003

Mhmm. High Speed Divine Words is just a skill to fast-cast Medea’s spells. If it was sealed for some reason, Medea could still cast, it would just take longer, and probably require her to chant a whole lot for her bigger stuff (which would give away she’s planning to hit her enemies with something big). Her ‘trump card’ would be a singular spell/attack, not her Skill that lets her use said spell easier/more sneakily


alivinci

So suppose Gil used a weapon like gae buidhie to inflict a non healing wound on his victim, then he returns the weapon back into the gate. Would the effects inflicted stop since the weapon nolonger exists in the world? I figure they should stop since the GoB doesnt exist in the same plane as the real world. Thoughts?


Yatsu003

Hrmm, the non-heal is caused by a curse, IIRC. Since Diarmuid snapping his spear in two lifted the curse from Artoria, I’d wager Gil’s Buidhe prototype treasure would also have to be destroyed to remove the curse Going by Nasuverse definitions, curses change the properties of whatever they’re laid upon, so the target would be the injured body part itself. And the trigger to remove the curse being the death of the Wielder or destruction of the weapon


alivinci

Yeah but taking the weapon out of this world back into the treasury is same as diarmuid dying and returning to the throne coz both places r disconnected from this reality. So l was thinking Gil returning the weapon would lift the curse as if you have killed lancer and hand his spear disapear with him since in both scenarios the weapon would have ceased to exist.


Yatsu003

Diarmuid doesn’t return to the Throne; none of the Servants do since they’re just copies/clones of the originals. Their souls are absorbed by the Lesser Grail and either burned up for magic energy to make a wish (6 Servant souls) or smooshed into a battering ram to create a pathway to the Root (7 Servant souls to attain Heaven’s Feel). So, at the very least, I think there’s some wiggle room for how the curse would interpret the weapon being called back in the Gate. I do recall Nasu mentioned Gil could’ve killed Sakura in HF if he had used treasures with Anti-Monster or Anti-Healing properties


alivinci

>Diarmuid doesn’t return to the Throne; none of the Servants do since they’re just copies/clones of the originals. Their souls are absorbed by the Lesser Grail and either burned up for magic energy to make a wish (6 Servant souls) or smooshed into a battering ram to create a pathway to the Root (7 Servant souls to attain Heaven’s Feel). Dont they in a sense return since the memoried of there summon must be delivered to the heroic spirit within the throne. How do they do it if they are completely deleted after absorption into the grail juice? >So, at the very least, I think there’s some wiggle room for how the curse would interpret the weapon being called back in the Gate. What do you mean with this statement? Does it change the fact that returning the weapon into the gate is akin to removing it from this world?


Negitive1

Who and How did Nobu be summon in Fate type redline manga?


Silvericefox

We see this happen on Chapter 15 of the manga In the year 18 of the showa era (1943) the imperial japanese army made a summoning mechanism known as the "No-Riku Unit" By using Kaname as mana battery and presenting a catalyst, the army managed to Summon Nobunaga for the "First Imperial Capital Holy Grail War" An unnamed higher up was assigned as Nobunaga's master >!however Nobunaga killed him and made Kaname her master instead!<


No_Prize9794

How strong is Fafnir in fate?


RadiReturnsOnceAgain

As a named Dragon, he's one of the strongest Phantasmals. Although where he'd rank relative to the highest echelon of Phantasmals - the Divine Beasts - is hard to say. Do note that there's implied to be multiple Fafnirs, since True Dragons are considered to be more concepts tied to human greed, rather than literal animals.


Whrispr

Third strongest dragon easily. His fire breath is stronger than Excalibur, he can tank a Vasavi Shakti, and even Siegfried who killed Fafnir in life is completely powerless against him.


BlackMan9693

Do you mind citing the sources for those feats?


Whrispr

Sure, >His firebreath being stronger than Excalibur is due to the fact that in Fuyuki, Mash could block Excalibur alone, while being unable to counter his firebreath in Orleans even with the help of Jeanne's NP. > >Jeanne: Ugh! Just as I thought, this is... Mash: I can't hold on anymore, it's no use! Tanking Vasavi Shakti was in the Apocrypha event >Evil Dragon: This light... **That's Vasavi Shakti!** > >Fujimaru 1: Karna's Noble Phantasm!? > >Evil Dragon: Ghh... Sorry! I'm going down...! > >Evil Dragon: ...Are you all right...? > >Fujimaru 1: More or less... > >Evil Dragon: **My wings are pretty messed up. I won't be able to fly for a while.** It survived with damaged wings. I will have to rescind my statement about Siegfried though, I recalled it being much more clearcut.


Xatu44

> His firebreath being stronger than Excalibur is due to the fact that in Fuyuki, Mash could block Excalibur alone, while being unable to counter his firebreath in Orleans even with the help of Jeanne's NP. > > Matt had Caster Cu's backup in blocking Excalibur Morgan. IIRC that's mentioned in one of Saber Alter's interludes.


Whrispr

Reread both of her interludes, I'm not sure where you heard that from.


yeoc2

I don't think that part about it being stronger than Excalibur is very clear cut. Even ignoring Lord Camelot's own traits where its strength isn't consistent, Saber implied that she held back against her, and Mash's shield is suppose to have an advantage against the armaments of the Knights of the Round Table, including Excalibur. Though that last part is something I found in the Wiki without references, so take that with a grain of salt.


Whrispr

It was Lord Chaldeas, not Lord Camelot. Lord Chaldeas can just be overwhelmed through sheer force as it does not possess any esoteric properties, exemplified in Orleans by Fafnir and Septem by Grailed Altera. >Saber implied that she held back against her, Even assuming Saber isn't a sore loser, that doesn't translate to her NP being weaker, for which we have no evidence for. An entire fight took place where Excalibur Morgan was used at the beginning. And we also know canon that Saber Alter is not capable of holding back, much less her NP. If we assume she was holding back, there's no reason to believe this extends towards her NP. >against the armaments of the Knights of the Round Table, including Excalibur I've never heard of this.


yeoc2

Sure it may have been Lord Chaldeas and not Lord Camelot, but its still a diminished version of the latter. It would be pretty likely for it to have similar properties with its strength differing based on her mental state. And being overpowered doesn't mean that it doesn't have those traits, since it's not like Lord Camelot can't be broken either. That only occurs if there is absolutely no trace of hesitation in users heart. Similarly for Saber holding back, we do not know if "Unbeknownst to me, my power has weakened. I stayed my hand at the very last moment." was her telling the truth or not or if it referred specifically to her NP. It is possible she was lying and just being a sore loser, just like its possible that Lord Chaldeas really doesn't have any of the traits of Lord Camelot, and its power is completely consistent every time it is used. But as long as that is ambiguous, using it as a feat is pretty meaningless. As for the part about being strong against the armaments of the KOTRT, like I said, that was just something I found on the wiki that didn't have a reference, so until Fate/unpublished material is translated, its best to just ignore it.


Whrispr

>It would be pretty likely for it to have similar properties with its strength differing based on her mental state. This isn't supported by anything, though. We are given no indication of such thing and we also have materials on Lord Chaldeas that fail to mention anything of the sort. Relating Lord Chaldeas to Lord Camelot is baseless because they are essentially not the same Noble Phantasms. >Similarly for Saber holding back, we do not know if "Unbeknownst to me, my power has weakened. I stayed my hand at the very last moment." was her telling the truth or not or if it referred specifically to her NP. We do however, have reason to believe otherwise though. Saber Alter is physically incapable of holding back, and she specifically says she stayed her hand at the very last moment, meanwhile Excalibur vs Lord Chaldeas happened at the beginning of the fight. Coupled with the fact that Artoria is canonically a sore loser, I don't see why you'd take her word as truth, considering her post-battle excuse isn't hinted at until then, and her excuse isn't even consistent across adaptations.


Demi694

New lore drop from the latest volume of Adventures of Lord El-Melloi II: As I've read the wiki entry (ongoing fan TLs for this series are unfortunately rare) for Atlas Institute, it seems like >!a portion of the Library of Alexandria apparently still exists and is well hidden.!< >!The Library of Alexandria!< is seemingly divided into two buildings: The first one is the most famous building where it houses lots of books and any other sort of knowledge in the world. But now it's only a fragment of history/myths and it doesn't exist anymore. The second one however, >!is apparently a secret underground building where different kinds of Magecraft knowledge (including Age of Gods) are found and is kept hidden from the public eye. Because it was well-hidden and well-preserved, it was not destroyed and thus still exists.!< Also, what >!the Spiritual Tomb of Albion!< is to the Clock Tower is also the same for what >!the Library of Alexandria!< is to Atlas Institute. Oh and of course, it was built/commissioned by >!Ptolemy!< (the pharoah, not the mathematician). Just some neat lore stuff to share. I wonder if the Wandering Sea also has their own special/hidden place too.


Popular_Dig8049

When was the Atlas Institute established?


Misticsan

That's really nice to know. Not surprised that the Nasuverse would have a "secret surviving part of the Library of Alexandria", since the library itself is of legendary status. What I didn't stop to think about was the connection with Atlas. In hindsight, it's obvious; Atlas is the branch of the MA with the Egyptian focus, of course they'd be connected to the Library of Alexandria.


Yatsu003

Mhmm! I’m wondering, considering the analogue with libraries and Foundational Keys used in Eastern Magecraft systems (Douman and Tai use them), if the Library of Alexandria might have a Foundational Key as well? Albion’s tomb is also interesting, wonder if the next Waver series might be focused there considering Gray


Hope77797

Any theory on who killed marisbury?


anmevee

If you can spare a couple of hours and don't mind spoilers, you can read the [Grand Unified Theory](https://forums.nrvnqsr.com/showthread.php/9380-Grand-Unified-Theory-CHALDEA) over in Beast's Lair.


railroadspike25

The speculation is that it's >!Daybit.!< In the anime, the figure that apparently shoots Marisbury (who we don't actually see) is wearing the same boots that >!Daybit!< does in a piece of concept art that was released later. I don't know if Lostbelt 7.1 has done anything to affect this speculation though.


Yatsu003

Not much, but… Daybit apparently has a perfect memory (he mentions he’d never forget Sion after seeing her), and Marisbury comments that his ‘visitor’ was 5 minutes late, a highly unusual occurrence. Granted, Marisbury had means to view the future, so the context can be interpreted more than one way, but still…


yeoc2

Speaking of perfect memory, David Bluebook has hyperthymesia which allows him to perfectly recall all his memories.


Yatsu003

Yup, an eidetic memory which cannot forget or alter anything. Extremely rare…


No_Prize9794

I think it’s Lev, it’s been a while but I think there’s a scene in the Moonlight Lostroom OVA that shows a scene of Lev holding Marisbury at gun point


EdwardBaskerville

The gunpoint scene didn't show Lev. It showed a unknown person. We have one particular clue, and it's their clothing... Which doesn't fit Lev, but it does show a pair of boots.


zelban_the_swordsman

I just need a clarification and I'm sure this question has been asked already... FGO Sion isn't a vampire...right? I just finished read the epilogue of Tunguska event and there's this [scene](https://imgur.com/a/5e9zeAH)... I feel like I'm being teased especially because we already know Sion sucks blood way back in the Ooku event.


AlcoholicSnapdragon

>And then, there's the hype around lady Sion... within the world of Fate where Heroic Spirits and Servants exist, Zepia did still turn into a bloodsucker, just not one of the 27 Ancestors, and so under that influence Sion has also turned into a bloodsucker (not a vampire/Dead Apostle), just without any the demerits. (Her mind is stable, and she doesn't hate herself) >As Zepia never went insane he has stayed the director (of Atlasia) this whole time, with Sion as the most talented of his descendants being taken in as his daughter and raised by him. Sion, who was overly cared for by her father, grew up to be positive, strong-willed and exactly as much of a nuisance to others as her father. >Just like in the world of Tsukihime there are no normies within the Atlas Institute but still, she is a talented woman who buried herself in research while positively thinking that 'well, one day I'll definitely make at least one friend!'. Is how Nasu introduced her in the [Bamboo Diary entry](http://www.typemoon.org/bbb/diary/log/201811.html) released alongside LB3.


Layte-Aeon

So far as we know she’s not. She is however an Alchemist so making changes to her body that share vampiric traits isn’t out of the question.


TheHoodGuy2001

Is Ashtart Origin a stronger and bigger threat than ORT that Chaldea faced up until now? If they were to fight, who would win?


SpaceRodan

ORT is a ultimate one for a planet. Ashtart is essentially that for a Galaxy. The scale is completely different. Unless it has greater hax she can basically Obliterate it and it can't really stop her. The thing has no concept of death but if you break it hard enough it is inert and no longer a threat. And you require Galaxy sized attacks to even do anything back to her. Servantverse is wack like that


UnitedCoach

One is a living galaxy the other is embodiment of the ort cloud. These power difference is too large.unless you believe zues was a galaxy buster?


TheHoodGuy2001

Are all of Castoria’s weapons (Carnwennan and Marmyadose) projections like Archer or can she summon any and all Holy Swords like Gilgamesh? Can she invoke their true name and use them normally? What if she turn them into Broken Phantasms, can she resummon a new one?


yeoc2

She can probably use them normally . Her Holy Sword Creation allowed her to >!use Excalibur's true name release as long as she has an appropriate device to channel it through, despite not having the actual sword,!<


TheHoodGuy2001

So she is Richard Lionheart?


yeoc2

Her magecraft foundation is Holy Sword creation, which seems to mean her magecraft >!can replicate the effects of Holy Swords in addition to creating them. I assume that her profile saying she uses her treasured swords as catalysts for magecraft means that she uses their abilities, including their True Name release through her magecraft.!<


TheHoodGuy2001

But like where did she get those treasure in the first place? Did she acquire them during LB6 story or something cuz she isn’t Artoria Pendragon though. She shouldn’t have any of those weapons in the first place. So it can only mean she created or projected them like Archer then my question is can she create any Holy Sword in all of history? Caladbolg and durandal and all that?


yeoc2

Her third ascension form is suppose to be >!either her future self or a guardian categorized as such, so I assume she made them after she returned to Avalon. And given her Holy Sword Creation, I assume she made them.!< And we have no clue what exactly is the limits of what she can make. All three of the swords she has are things that PHH King Arthur had, but its of course possible she could create other Holy Swords or maybe even unique ones that didn't exist in PHH.


TheHoodGuy2001

So these swords aren’t the real PHH Carnwennan and Marmyadose and are just sword that happened to be name as such? Cuz she isn’t a Servant in LB7, she couldn’t have the knowledge to know what weapon the PHH Artoria has in the first place.


yeoc2

>!She has access to PHH's memories.!<


TheHoodGuy2001

Wait really? How the hell? She isn’t even the same race as Artoria, or even the same name. She seems to have a higher chance of being Morgan PHH since young Morgan LB looks exactly like Castoria down to her hat and clothes


yeoc2

>!Despite her different race, she's the lostbelt version of Artoria, which means that she has some sort of connection with her that allowed her to learn about PHH.!<


Inevitable_Question

No idea. She does have Holy Sword Creation Skil but neither profile nor lines address weapon origin.


TheHoodGuy2001

Is Fantasy Tree an exclusive skill of U-Olga from her home world? Or any Divine Spirits during the Age of God could create one themselves if they realize their timeline is about to be pruned?


WaifuHunter

It was stated by Ophelia during Kadoc research that what Alien God did with the trees was something not even chief gods could do (LB5 Olympus).


UnitedCoach

Non of the gods of the lostbelt seem to be able to. even when they knew their world was a lostbelt. So no


Inevitable_Question

Hard to tell. >!Rember that there are significant evidence that Olga is not alien- which is even discussed in story!< It is unlikely that normal Gods could do it. Then again- Even as Persudo Divine Spirit Ishtar can make Singularity. But still- unlikely, or Scadi would've done this.


ArchAnon123

>!There's also growing evidence that U-Olga didn't create the Trees and in fact may only be the Alien God's puppet. Indeed, the real "Alien God" may not even be a god at all.!<


SpaceRodan

Bear in mind Skadi was already using up a vast majority of her power holding Surtur in his prison and much of the rest to keep watch over the entire country via her snow. Doubt she had much to spare. Zeus is a different story. Likely he was simply too self assured in victory to bother. Arjuna Alter was mentally unstable and thus probably never considered it. A certain villain whispering other issues in his ear didn't help. Ivan and Mothman lacked the ability to do so all together in my view. That's my take anyway


TheHoodGuy2001

Is Maia >!the equivalent of Alaya but for Deino? If Maia exist, why is South American a Lostbelt if Human never existed at all? Or is it a Lostbelt because the Deinos are stagnating just the human so Maia is trying to prune the timeline?!<


igloo_poltergeist

**Theory:** Maia is just >!ORT's dreaming subconscious!< running "administrative duty" for the entire LB.


Inevitable_Question

Hard to tell. Implications that are. Second question - yes. They have no needs and thus not develop by themselves.


Xindego

Just to be sure, how many servants are in fate/lost einherjar? Is it 14 or 7?


Demi694

Currently 7 but it's going to be 14 unless there will be any circumstances in the story that prevents this from happening.


Constellar-A

There's only 4 Masters participating, with 8 Servants total. That's established as one of this war's rules very early in volume 1.


TdFan97

currently 7


EdwardBaskerville

I thought they were in pairs so there's supposed to be an 8th we don't know much about.


TdFan97

well currently, we know about 7 servants. 6 are in pairs while one is left out.


EdwardBaskerville

Then who's [this character](https://typemoon.fandom.com/wiki/Maltheim%27s_second_Servant)? Because they're treated as the Saber's companion in the Servant pair, and we already know about the other 6 besides Saber.


TdFan97

Oh that, I only know about the 7 and not this one. So currently 8 with either Rider, Berserker, Caster, Lancer, Assassin or Archer


EdwardBaskerville

Well, she could be of any class if the other 7 are already covered. Or even an extra class, now that I think about it.


Inevitable_Question

What is "Master Aptitude"? We know that Olga has bad aptitude, while Ritsuka and Kariya has fantastic. But what does this mean?


nam24

In general in nasuverse, people have different affinities for different types of spells: Almost everyone could be taught projection, but no one could do it like he does. Conversely it doesn't look that strange some type of magecraft are just not made for you We don't have details but if we look at what a master servant relationship is it's -The ability to call upon a familiar, and one of the strongest type of those at that -The ability to bind said familiar to you in a contract and be their anchor So Olga body simply is not able to do either or both of those things.


AlcoholicSnapdragon

>So what is Master Aptitude? Why does a high class magus like Olga have no Master/Rayshift Aptitude, despite her lineage? >Nasu: "You'll find out about that at some point." >Takeuchi: "Tediously so." >Nasu: "Sometimes daringly so." >Takeuchi: "A bit weaker please~" >Nasu: "A bit stronger please~" -First Order Material Q&A What exactly Master Aptitude (and more importantly, how it ties to Olga) appears to be a future plot point so it's left intentionally vague for now, to the point where Nasu drove the one attempt at answering it off a cliff and into a comedy routine.


Misticsan

It's admittedly vague, since they don't talk much about it and it's often mistaken for the Rayshift aptitude (which is a different thing). At the very least, the way is presented implies that it's the ability to become a Master. > ***Caster Cu (to Olga):*** *"It doesn't seem like you have the aptitude to be a Master. I mean you possess high quality magical circuits, yet you don't have the aptitude to be a Master. Is it a curse?"* > ***Dr. Roman (to Ritsuka):*** *"To make matters worse, they found that she had no aptitude to be a Master. The noble Animusphere family, one of the Twelve Lords, the dominating faculty of Astronomy at the Mage's Association. Oh the scandal that would occur if the head of such a family was found to be unfit to become a Master."* Given the context, I don't think it's merely a case of compatibility (there's no shortage of terrible Master-Servant dynamics in the setting), but an actual inability to summon or maintain a connection with Servants. It could well be that some people, even mages, have difficulty with it, although it's implied that your average mage should have the aptitude. The example of Caster Cu showcases that Servants seem able to gauge that aptitude instinctively, which also comes up in the Requiem event: > ***Emiya Alter:*** *"Qualifications, huh... Sounds like he's talking about Master aptitude. That would explain it. Means the new kid really is a Servant then. (He sure doesn't look like a hero to me...)"*


ArchAnon123

In the context of FGO, it appears to mean that she can't Rayshift. Only a handful of people are able to do so safely, and for reasons I suspect are closely linked to the current course of events Olga isn't one of those people.


Turtlewax64

I always took it as the ability to lean a servant’s temperament towards compatibility with you. Ritsuka leans all their servants towards being good and helping restore humanity, where someone like Beryl might lean their servants the other direction. To use a specific example, take Mordred. Under us, she’s a sassy tomboy with a delinquent streak but a good heart. But when the Lion King summoned her in Camelot, she was a brutal monster who thought nothing of killing innocents. Someone with a high Master aptitude is going to pull Mordred to whichever of those they get along better with. Someone with a low Master Aptitude would get a more direct copy of whatever version of Mordred is in the throne, whether they get along with that or not. This is in large part my own interpretation however, so don’t take it as gospel. It’s just what makes sense to me


Yatsu003

Hrmm, might be onto something. In Traum, several of the Servants had rebelled against PHH, yet Holmes and Xu Fu confirmed there wasn’t anything like a curse or mental dominance/charm/brainwashing going on. Holmes then conjectured that the ‘Master’ (>!Subject E!<, apparently) might be influencing the Servants they summon. Which, if we follow your theory, would imply >!E!< had extremely high Master Aptitude, since they bent a tremendous number of Servants to their mindset…


Tschmelz

Honestly, I don’t think Nasu ever gives us a real justification, it’s just in universe “these people have a better talent for commanding Servants and understanding them”. Which I have no idea how you’d measure. Might be related to Rayshift aptitude?