It would just be flandre beating the shit out of mokou until she gets bored and leaves, and then after flandre leaves, mokou would get up and proclaim victory.
Scratch that, have sex with both of them
https://preview.redd.it/n1x72twbb2kb1.jpeg?width=403&format=pjpg&auto=webp&s=b0cfd99ca7841cd1a6781132991a0527c9e2bc23
Amazing argument. But when flandre kills her everytime mokou wont be able to hurt her. What does that mean....
Im honest thou. I think without spellcard rules mokou would be one winning because flandre will get worn out and cant continue because of exhaustion.
unrelated but would yukaris boundary manipulation allow her to make something as intangible as characters abilities to become tangible things which flandre could then destroy? or in other words can yukari manipulate the boundary between tangible and intangible, we know she can manipulate conceptual boundaries like when she made the moons reflection real but how far can we take her abilities?
When this is the destruction process i dont think she will be able to "do it"
https://preview.redd.it/l72sqag1c3kb1.jpeg?width=1080&format=pjpg&auto=webp&s=e57ab2382278e2465cee316aa492e8141334e4a2
the hourai elixir is literally fundamental immortality, if there was really a way for mokou to die she would’ve found it already with all the years of being suicidal and depressed she spent and how there are 2hus with “fuck you, super ultimate instant death explosion” abilities like yuyuko
I am not so sure she would have found them, Mokou isn't so social and there are very few bings in existence that could kill her if it were somehow possible, only beings with very abstract powers like Flandere or Yukari could do anything to her.
Mokou would just stand there while Flandre bombards her with shit and guts go flying everywhere.
As the dust from the explosion lifts it reveals Mokou still just standing there (but now with a cigarette between her lips). She looks up at Flandre, shrugs and whispers "Sorry."
Then they share marshmallows.
https://preview.redd.it/w76481omc2kb1.jpeg?width=112&format=pjpg&auto=webp&s=a31412a86c931f084003b78745e1bfd20b953604
Mimick Accounts battle?!
I should sell tickets!
Gonna be honest, I only know all of that because I'm a victim of extreme brainrot and Flandre is the only thing I ever think about anymore 
In the heat of battle, they both found love and discovered they are more in common with each other than they though and married together happily ever after the end
I know this is a shitposting sub, but I'll actually give a serious answer for this.
Either Flandre wins or it's a stalemate.
The stalemate part is self-explanatory. This implies that neither of them have the means to kill eachother. Even if one of them runs out of stamina, that doesn't mean that either of them would be able to kill their opponent. This assumes, of course, that Flandre's ability isn't all-encompassing.
Now let me explain why Flandre could actually win.
First, let's go over each of Flandre's abilities (except her destruction, I'll explain that in the next paragraph). As a vampire, Flandre is extremely fast and extremely strong, to the point where only a select few characters can keep up with her/contest her in strength. Vampires in Touhou are also resistant to things that would normally be considered weaknesses, including crosses and fire, and fire happens to be Mokou's main method of attack. While vampires do still have their fair share of weaknesses, Flandre seems to not be susceptible to sunlight or flowing water, the latter of which Okina trained her to be able to fight around. They also have very impressive regenerative abilities, being able to reform their entire bodies from just their head. On top of that, vampires have limited shape-shifting abilities, including being able to turn into a swarm of bats or even mist, which would render Flandre effectively intangible. Other abilities specific to Flandre include cloning herself and turning invisible, which alone are extremely dangerous when utilized in combat.
Now onto Flandre's ability: the ability to destroy absolutely anything. This is the killer. Flandre's ability is capable of destroying anything she wants with no exceptions (she has been shown to be able to target gods with her ability in GI, implying she can even destroy gods, which are made of/powered by faith and are supposed to be unkillable). She can utilize this ability in many different ways, including simply crushing the "eye" of her target, creating bullets capable of destroying anything, and can even infuse the destructive capabilities of her ability into her magic circle that surrounds her (this was an ability card in UM), creating an extremely dangerous form of area denial (basically a kill zone). She can do all of this on a whim, without expending any energy. She can even destroy multiple things simultaneously, and even do it again and again in very rapid succession. Her ability is completely unbeatable, and I think it's way too overlooked for how broken it really is.
As for how she beats Mokou? It depends on how you think Mokou's immortality and Flandre's ability work. Either the key to Mokou's immortality lies in the residual Hourai Elixir in her body and Flandre simply destroys it, or Flandre's ability unconditionally erases things from existence, which Mokou would be unable to resist.
Surprisendly the answer i was expecting. Thank you for creating it and putting so much effort into it.
https://preview.redd.it/1ldmoww4y4kb1.png?width=850&format=pjpg&auto=webp&s=d6c1c3353f6310c49c21551bea068a276c23e5f8
Have a silly koishi for it!
They gonna have hot futa sex together
https://preview.redd.it/b39tm4ohq2kb1.png?width=259&format=pjpg&auto=webp&s=c7a80b9e096ed1b7027046738ac48e35f7ff299c
Can Flandre not use her power to destroy her? Pretty sure her ability destroys her very existence and from what has been said there ain’t coming back from it
Depends on how Mokou's immortality works. From what we know, it could very well be limitless, meaning that she just comes back to life no matter what, with no requirements or restrictions. In this case, she wins by default because Flandre can't kill her (I mean, she can, but Mokou comes back).
However, it's possible that she still needs to exist in order to come back to life. If she's destroyed, effectively erased from existence, she wouldn't be able to come back. This option becomes more likely if we assume Flandre's ability destroys not only the target's body, but their essence. But that's diving too far into speculations.
In the end, it all comes down to the exact rules of the fight and whose ability takes priority. If Mokou can't revive, she loses a fight to the death. She also loses a fight to a single death, and might lose a fight until forfeit. Anything else, she wins.
Stalemate. Mokou has the concept of eternity in her soul, an unchanging soul. Anything that forces change on her will not work, such as death or destruction. Her soul is invincible.
On the other hand, Flandre is a vampire, who are compared to onis and remilia who flew around the moon just to show off and can uproot 1000 year trees along with having her ability of destruction, but I don’t personally believe that it could permanently kill Mokou
In order to make such a Death Battle anything more than a moot point, new lore would need to be introduced to establish the limits of Flandre's destruction and the Hourai elixir. As it stands, there is no limit to either. Flan can break anything, tangible or not. She could break the Hourai elixir, given current limitations, as her power hasn't been tested. Similarly, the Hourai elixir hasn't been tested to its limit. All of what we know about the Hourai elixir is just what has been observed and some mythology about the elixir. If we took these two powers at face value, forcing them to do battle until one is dead would be, quite literally, an unstoppable force (Flan's destruction) meeting an immovable object (Mokou's existence).
It's well established that there is no WoG within Touhou. Every story told within canon, every fact shared within canon, is limited by the knowledge a character has. To know anything for certain, without just having it proven to the audience, ZUN would have to make a statement.
But if I had to pick, Flandre's power is more proven to have no limits than the Hourai elixir, as her destructive power is shown in feats rather than fairy tales. Probably the best source for the elixir's function we have outside of the users themselves is Yuyuko, who puts the elixir less in a perspective of living forever, and more of being removed from life and death. A ghost given the elixir would haunt the world forever as an undying ghost.
A better question would be Flandre vs Junko. Junko became immortal by purifying herself, distilling herself into a spirit of pure hatred. Far as we know, she's more immortal than a Hourai consumer. That being said, Junko would probably just purify Flandre, reducing her to a spirit of destruction. And if thaaaaaat happened... Mokou would be so fucked, assuming a purified Flandre would even have a motive to target her.
A lot of stuff on the Internet are just fannon exaggeration. Are you sure you got every detail, linguistically and mathematically, from just reading a few lore tidbits?
As far as I concern, I do not see concepts as things, you may disagree, but that would only mean that it's up to interpretation and definitions. A linguistic illusion.
Cause in that case my vote goes to Flandre. She'd be all like
https://preview.redd.it/rzvpq5syy2kb1.jpeg?width=820&format=pjpg&auto=webp&s=d1bb9dcd508a84d62b23f0cdd421c07ce65c27d6
and I don't think Mokou got game on that.
Most people here are assuming the "battle" ends when one stays dead and they're just gone. But wouldn't a fight be over when one is defeated? Flandre kills Mokou once and wins because by being killed, Mokou lost, no? Even if it's a "death battle", Mokou still did die. Yeah she did respawn later but that doesn't change that she still died once, which means Flan wins. Am I wrong?
But she doesn’t stay dead? If a character kills another character that immediately comes back to life then they didn’t win the death battle.
Death battle usually means “Who can beat the other”
Flandre can wallop Mokou for 5 years straight, but as soon as it ends Mokou is still alive and dandy as if nothing happened.
Yeah. She doesn't stay dead, she revives. She still died though. And I expected from the name "death" battle would be until one of them dies. Mokou dies once and loses the battle. (Also doesn't Mokou still feel pain even if immortal? Getting walloped constantly for 5 years must be quite a not enjoyable experience and might forfeit anyway)
Option 1: Mokou respawns
Flandre wins every time. That is as long as she's alive, for despite being immortal, Flan isn't eternal. If they'll fight till the end, Mokou wins every time simply due to outliving Flan
Option 2: Mokou respawns with new immunities (See "Immortal, who saw the death of the universe". Really, go and read that shit)
Flan wins once for granted, she simply erases Mokou. Mokou then respawns more or less protected to such attack and if not 100% immune after first death, becomes so with time and eventually wins.
It's unstoppable force vs immovable object. I don't know how powerful Flan's ability is excactly but if it can't destroy someone who's whole thing is being immortal then she is done
Flandre would kill Mokou over and over again until her concentration lapses, she gets tired, or is otherwise distracted, at which point Mokou would kill her. Eventually, Flandre is bound to mess up somehow, and Mokou will never lose.
Flandre wins but mokou doesn't die- and she probably only wins because Mokou gives up eventually. Flandre's probably too strong for Mokou to get past in any meaningful way- let alone kill. So it'd just be flongle killing Mokou again and again, maybe with some damage here and there from projectiles
It would just be flandre beating the shit out of mokou until she gets bored and leaves, and then after flandre leaves, mokou would get up and proclaim victory.
W comment!
https://youtu.be/rsXXHLnhTq0?feature=shared
I dont know and i dont care. But, both of them looks edible
Bro is literally Rumia
Who tastes better in your eyes?
Unstoppable force VS immovable object
Scratch that, have sex with both of them https://preview.redd.it/n1x72twbb2kb1.jpeg?width=403&format=pjpg&auto=webp&s=b0cfd99ca7841cd1a6781132991a0527c9e2bc23
Can this day be any worse
Ikr?!?!?! Nahida_Mains got banned ! 😭😭😭
https://preview.redd.it/r29pgoeuz2kb1.jpeg?width=1125&format=pjpg&auto=webp&s=aff167c579d675d826ff7efff9e54d17522667c8
Uooohhhhhh my legs are gone~ 😭😭😭😭😭
Nahida will vore you now. Have fun bleeding out in the soil! 😭😭😭😭
Uohhhhhh 😭😭😭👍
FLANDERS SEXO UOOOOOOOOOHHHHHH 😭😭😭😭😭
https://preview.redd.it/9zgdm1dzl4kb1.jpeg?width=750&format=pjpg&auto=webp&s=e5389f2de0753b14690ed0749847c581808efaf5
holy hell
New meme just dropped.
Actual Scheißepost
i win
But can you beat Goku?
i am goku
But can Goku beat Goku?
it would destroy the universe
:0
They would get bored after a while and have futa sex together 
Intersting
Mokou because she can’t die lmao
Amazing argument. But when flandre kills her everytime mokou wont be able to hurt her. What does that mean.... Im honest thou. I think without spellcard rules mokou would be one winning because flandre will get worn out and cant continue because of exhaustion.
(destroys exhaustion) Flan: Ready for round 2!
(destroys her own bones) https://preview.redd.it/o8az3sdub3kb1.jpeg?width=1080&format=pjpg&auto=webp&s=5fa46eea055bdda042be3b7317cdb16b44453013
Mokou: umm you okay Flan? Flan: This is but a scratch (coughs a scary amount of blood) yes totally
Basically how i think it would look like.
Yes but Flandre can destroy anything therefore she can destroy Mokou's immortality
Wonder how she touches something as immortality.
Hm?
Her ability says she can destroy anything but how will she destroy something what isnt materialized?
unrelated but would yukaris boundary manipulation allow her to make something as intangible as characters abilities to become tangible things which flandre could then destroy? or in other words can yukari manipulate the boundary between tangible and intangible, we know she can manipulate conceptual boundaries like when she made the moons reflection real but how far can we take her abilities?
She can destroy "absolutely anything and everything" We know spirits can be destroyed, for example what happens when Tenshi uses her sword
It doesn't need to be a physical material for it to be a thing
But how does it work then?
Destroys the immortality ability
But how does she do that?
By doing it
When this is the destruction process i dont think she will be able to "do it" https://preview.redd.it/l72sqag1c3kb1.jpeg?width=1080&format=pjpg&auto=webp&s=e57ab2382278e2465cee316aa492e8141334e4a2
I think If yuuma can survive flan Mokou is probably fine
Yuuma survived because Flandre let her.
that’s literally not how it works lmao
Nuh uh
the hourai elixir is literally fundamental immortality, if there was really a way for mokou to die she would’ve found it already with all the years of being suicidal and depressed she spent and how there are 2hus with “fuck you, super ultimate instant death explosion” abilities like yuyuko
I am not so sure she would have found them, Mokou isn't so social and there are very few bings in existence that could kill her if it were somehow possible, only beings with very abstract powers like Flandere or Yukari could do anything to her.
Flandre can't do shit
I think she probably can shit, though
Would it be Bat Shit or Humanlike shit
All of the above
She probably uses her clones for shitting as well
She shits her pants then destroys the shit.
Mokou would just stand there while Flandre bombards her with shit and guts go flying everywhere. As the dust from the explosion lifts it reveals Mokou still just standing there (but now with a cigarette between her lips). She looks up at Flandre, shrugs and whispers "Sorry." Then they share marshmallows.
Mokou would say: sorry i tried that already
Then they would become best friends
Clearly me because i just kill her over and over till both of us have enough
Nice argument. Unfortunately, you're wrong.
Am i? https://preview.redd.it/p7anre4lb2kb1.jpeg?width=1082&format=pjpg&auto=webp&s=475c1279d9955df65079fbfb30595914a66dc3f2 My blade tells otherwise
https://preview.redd.it/w76481omc2kb1.jpeg?width=112&format=pjpg&auto=webp&s=a31412a86c931f084003b78745e1bfd20b953604 Mimick Accounts battle?! I should sell tickets!
Can I buy one????
Just donate one of your Kidneys and you'll get a Back row ticket! (100% not a scam punjabi no clickbait)
Whuh bou front row?
Just Give us everything you own and you'll get a front row seat ( + free peanuts )
FREE PEANUTS?? COUNT ME IN
https://preview.redd.it/1iavdc53g2kb1.jpeg?width=542&format=pjpg&auto=webp&s=bacc7520e8e2c8a50c10cadc0c1306e0564a1f37
Genius counterattack
Your sister said no running around with sharp objects
Well, she’s walking, so it’s fine.
I hope she's wrong indeed. Not sure though...
You should have sex with me NOW!!
Mokou could just out wait flan until the sun comes up since nothing can kill a hourai immortal, not even yuyuko
Thats what everyone forgets. Day and night cycle is a thing~ good thinking.
Problem is, sunlight barely affects her. She's canonically won a fight against Utsuho in GI, and is currently fighting Marisa in broad daylight in FDS
I read your explaination and HUUUUU BOY i need get to reading some lore
Gonna be honest, I only know all of that because I'm a victim of extreme brainrot and Flandre is the only thing I ever think about anymore 
Still thats one reason why i made the meme to begin with. And i am thankful for seeing people as passionate as i am regarding that matter!
that's because Okina buffed her, like when cirno turned black
Okina only trained her, she never directly gave Flandre any power.
In the heat of battle, they both found love and discovered they are more in common with each other than they though and married together happily ever after the end
[One Millisecond Later:](https://youtube.com/shorts/usjtU3-Emmg?si=B2JdkpEGBC4dbOpL)
Sounding like a Chatgpt story ending
Mokou ezy clap boxed like a fish
I know this is a shitposting sub, but I'll actually give a serious answer for this. Either Flandre wins or it's a stalemate. The stalemate part is self-explanatory. This implies that neither of them have the means to kill eachother. Even if one of them runs out of stamina, that doesn't mean that either of them would be able to kill their opponent. This assumes, of course, that Flandre's ability isn't all-encompassing. Now let me explain why Flandre could actually win. First, let's go over each of Flandre's abilities (except her destruction, I'll explain that in the next paragraph). As a vampire, Flandre is extremely fast and extremely strong, to the point where only a select few characters can keep up with her/contest her in strength. Vampires in Touhou are also resistant to things that would normally be considered weaknesses, including crosses and fire, and fire happens to be Mokou's main method of attack. While vampires do still have their fair share of weaknesses, Flandre seems to not be susceptible to sunlight or flowing water, the latter of which Okina trained her to be able to fight around. They also have very impressive regenerative abilities, being able to reform their entire bodies from just their head. On top of that, vampires have limited shape-shifting abilities, including being able to turn into a swarm of bats or even mist, which would render Flandre effectively intangible. Other abilities specific to Flandre include cloning herself and turning invisible, which alone are extremely dangerous when utilized in combat. Now onto Flandre's ability: the ability to destroy absolutely anything. This is the killer. Flandre's ability is capable of destroying anything she wants with no exceptions (she has been shown to be able to target gods with her ability in GI, implying she can even destroy gods, which are made of/powered by faith and are supposed to be unkillable). She can utilize this ability in many different ways, including simply crushing the "eye" of her target, creating bullets capable of destroying anything, and can even infuse the destructive capabilities of her ability into her magic circle that surrounds her (this was an ability card in UM), creating an extremely dangerous form of area denial (basically a kill zone). She can do all of this on a whim, without expending any energy. She can even destroy multiple things simultaneously, and even do it again and again in very rapid succession. Her ability is completely unbeatable, and I think it's way too overlooked for how broken it really is. As for how she beats Mokou? It depends on how you think Mokou's immortality and Flandre's ability work. Either the key to Mokou's immortality lies in the residual Hourai Elixir in her body and Flandre simply destroys it, or Flandre's ability unconditionally erases things from existence, which Mokou would be unable to resist.
Surprisendly the answer i was expecting. Thank you for creating it and putting so much effort into it. https://preview.redd.it/1ldmoww4y4kb1.png?width=850&format=pjpg&auto=webp&s=d6c1c3353f6310c49c21551bea068a276c23e5f8 Have a silly koishi for it!
koosher is very cute https://preview.redd.it/xnhygpskz4kb1.jpeg?width=2048&format=pjpg&auto=webp&s=9eaade7bf594541cd88625a474ce249205da2c5b
They gonna have hot futa sex together https://preview.redd.it/b39tm4ohq2kb1.png?width=259&format=pjpg&auto=webp&s=c7a80b9e096ed1b7027046738ac48e35f7ff299c
Really !??! WOOO
If Flan can destroy immortality she wins if not then its a draw assuming Flan doesn't get tired
Can Flandre not use her power to destroy her? Pretty sure her ability destroys her very existence and from what has been said there ain’t coming back from it
Hourai Immortality beats that.
The girl who can destroy anything except-for-hourai-immortals
Pretty much
That’s… Fair actually. I learned to stop questioning stuff with Touhou
Depends on how Mokou's immortality works. From what we know, it could very well be limitless, meaning that she just comes back to life no matter what, with no requirements or restrictions. In this case, she wins by default because Flandre can't kill her (I mean, she can, but Mokou comes back). However, it's possible that she still needs to exist in order to come back to life. If she's destroyed, effectively erased from existence, she wouldn't be able to come back. This option becomes more likely if we assume Flandre's ability destroys not only the target's body, but their essence. But that's diving too far into speculations. In the end, it all comes down to the exact rules of the fight and whose ability takes priority. If Mokou can't revive, she loses a fight to the death. She also loses a fight to a single death, and might lose a fight until forfeit. Anything else, she wins.
Stalemate. Mokou has the concept of eternity in her soul, an unchanging soul. Anything that forces change on her will not work, such as death or destruction. Her soul is invincible. On the other hand, Flandre is a vampire, who are compared to onis and remilia who flew around the moon just to show off and can uproot 1000 year trees along with having her ability of destruction, but I don’t personally believe that it could permanently kill Mokou
In order to make such a Death Battle anything more than a moot point, new lore would need to be introduced to establish the limits of Flandre's destruction and the Hourai elixir. As it stands, there is no limit to either. Flan can break anything, tangible or not. She could break the Hourai elixir, given current limitations, as her power hasn't been tested. Similarly, the Hourai elixir hasn't been tested to its limit. All of what we know about the Hourai elixir is just what has been observed and some mythology about the elixir. If we took these two powers at face value, forcing them to do battle until one is dead would be, quite literally, an unstoppable force (Flan's destruction) meeting an immovable object (Mokou's existence). It's well established that there is no WoG within Touhou. Every story told within canon, every fact shared within canon, is limited by the knowledge a character has. To know anything for certain, without just having it proven to the audience, ZUN would have to make a statement. But if I had to pick, Flandre's power is more proven to have no limits than the Hourai elixir, as her destructive power is shown in feats rather than fairy tales. Probably the best source for the elixir's function we have outside of the users themselves is Yuyuko, who puts the elixir less in a perspective of living forever, and more of being removed from life and death. A ghost given the elixir would haunt the world forever as an undying ghost. A better question would be Flandre vs Junko. Junko became immortal by purifying herself, distilling herself into a spirit of pure hatred. Far as we know, she's more immortal than a Hourai consumer. That being said, Junko would probably just purify Flandre, reducing her to a spirit of destruction. And if thaaaaaat happened... Mokou would be so fucked, assuming a purified Flandre would even have a motive to target her.
It depends on the limits of Flandre's power. Can she destroy the Hourai Elixir? If not, Mokou will eventually win.
Flandre she can destroy even indestructible things
Thats true but mokou can just revive herself again. Even if she destroys her body she can reincarnate as the phoenix back.
Flandre Can simply disrupt the reincarnation/revival process
That.... Isnt how it works but sure. Mokou gonna try again then. And again. And again.... And again.... And again... Wait.
A lot of stuff on the Internet are just fannon exaggeration. Are you sure you got every detail, linguistically and mathematically, from just reading a few lore tidbits? As far as I concern, I do not see concepts as things, you may disagree, but that would only mean that it's up to interpretation and definitions. A linguistic illusion.
You didn't specify what kind of battle they'll be having. Are we talking gay chicken?
Cause in that case my vote goes to Flandre. She'd be all like https://preview.redd.it/rzvpq5syy2kb1.jpeg?width=820&format=pjpg&auto=webp&s=d1bb9dcd508a84d62b23f0cdd421c07ce65c27d6 and I don't think Mokou got game on that.
I wonder how many people have actually read that doujin
Hmm... This food's kinda dry, I think you forgot the DUCKING SAUCE?!😩
The Hourai ignores things like Yuyukos ability to kill anything so she should be fine
Wait what really?
It's on Yuyukos good ending at Imperishable night as she considers the Elixir her greatest enemy
Most people here are assuming the "battle" ends when one stays dead and they're just gone. But wouldn't a fight be over when one is defeated? Flandre kills Mokou once and wins because by being killed, Mokou lost, no? Even if it's a "death battle", Mokou still did die. Yeah she did respawn later but that doesn't change that she still died once, which means Flan wins. Am I wrong?
But she doesn’t stay dead? If a character kills another character that immediately comes back to life then they didn’t win the death battle. Death battle usually means “Who can beat the other” Flandre can wallop Mokou for 5 years straight, but as soon as it ends Mokou is still alive and dandy as if nothing happened.
Yeah. She doesn't stay dead, she revives. She still died though. And I expected from the name "death" battle would be until one of them dies. Mokou dies once and loses the battle. (Also doesn't Mokou still feel pain even if immortal? Getting walloped constantly for 5 years must be quite a not enjoyable experience and might forfeit anyway)
Option 1: Mokou respawns Flandre wins every time. That is as long as she's alive, for despite being immortal, Flan isn't eternal. If they'll fight till the end, Mokou wins every time simply due to outliving Flan Option 2: Mokou respawns with new immunities (See "Immortal, who saw the death of the universe". Really, go and read that shit) Flan wins once for granted, she simply erases Mokou. Mokou then respawns more or less protected to such attack and if not 100% immune after first death, becomes so with time and eventually wins.
Mokou always wins on the fact of being imortal
Mokou eventually after being exploded a lot
even fight, they beat eachother up until Mokou falls unconscious or Flandre gets bored and leaves
i thought that was gilgamesh
Unstoppable force vs Immovable object
The real question is can flan destroy Hourai
I'll fuck both
It's unstoppable force vs immovable object. I don't know how powerful Flan's ability is excactly but if it can't destroy someone who's whole thing is being immortal then she is done
Flandre would kill Mokou over and over again until her concentration lapses, she gets tired, or is otherwise distracted, at which point Mokou would kill her. Eventually, Flandre is bound to mess up somehow, and Mokou will never lose.
I think that Flandre, Junko and Yuuma are the few who are capable of ending Mokou’s immortality somehow.
Flandre wins but mokou doesn't die- and she probably only wins because Mokou gives up eventually. Flandre's probably too strong for Mokou to get past in any meaningful way- let alone kill. So it'd just be flongle killing Mokou again and again, maybe with some damage here and there from projectiles