How strong is Sailor Galaxia (Death Battle Combatant)

Hello internet, it's Imperator100, most well known for my contributions to SM vs debating. So Galaxia, my favorite villain, is in Death Battle. My favorite verse, Sailor Moon is in Death Battle. Exciting (mostly because now people have to talk SM.) This will be a blog to give you all the relevant information on Galaxia for the purposes of this fight. 

I am certainly no expert on Beerus, so while I will be making some references to Beerus here and there giving what I hope are helpful comparisons, in this blog, I am going to leave debating who actually wins to those who know more about Beerus and moreso focusing on just giving the information about Sailor Galaxia.

This blog will be seperated into 5 sections describing Galaxia's capacities; power, speed, abilities, weaknesses, and other versions. I'll also at the end add some debunks of common misconceptions. This is not going to be vs battles wiki's style of analysis so don't expect Galaxia to be listed as infinite or immeasurable in speed though by their standards she would be.

Power:

Galaxia in her civilian form is depicted as having a power far above any enemy Usagi had ever fought (1). Galaxia then immediatly proves this is true by destroying the Holy Grail (1) (2) which previously absorbed and was the focus of the energy used by Eternal Sailor Moon to destroy Queen Nehelenia the Arc 4 Final Villain (1) (2) (3) (4) (5). Point being Galaxia is massively above Queen Nehelenia and Arc 4 Eternal Sailor Moon even in her civilian form as is Arc 5 Usagi in civilian form. Queen Nehelenia maintained the dark mirror universe which is a dark parallel universe (1)

Usagi would then transform into Eternal Sailor Moon. Bear in mind that Usagi's first henshin into her Super Sailor Form gave her 10,000x times the power of Pharaoh 90 and the Taioran Crystal at it's peak. (1) The Taioran Crystal heavily diminished is relative to Base Sailor Moon at the time and Pharaoh 90 is much stronger meaning that the Super Sailor Transform multiplies power by over 10,000 times. The multipliers for Base and Eternal Transformation are unknown but it took 10 Super Sailor Senshi level entities using all their power, as well as the power of their power guardians and castles to boost Super Sailor Moon to Eternal Sailor Moon (1) (2) (3) (4) (5) so it's likely at least a 10x boost, which suggests as far as multipliers go, Eternal Sailor Moon should be over 100,000 times the power of Base Sailor Moon. This means Eternal Sailor Moon in Arc 5 should be over 100,000 times that of Base Sailor Moon who is some unknown but likely large amount above civilian form Usagi. 

Because the Silver Crystal's power is determined based on the heart of the user (1) Usagi's power would rise drastically within the arc as well. The amp Galaxia gives to her minions was enough to turn civilian level entities like normal inhabitants of planets Coronis and Mau into being relative to Eternal Sailor Moon's power. Despite this Eternal Sailor Moon was able to fight the Sol Senshi after gaining the same Galacia amp, despite being relative to Eternal Sailor Moon's base normally, meaning Eternal Sailor Moon basically squared the difference in power by the Galactica Sol Senshi fight. This requires a lot of scans to show but the full evidence can be found near the end of the power section of this blog.

Eternal Sailor Moon would then go on to destroy all the Galaxia amped Sol Senshi with a single attack (1) (2), an attack which would do nothing against Sailor Galaxia (1) (2) and Galaxia would go on to block an even stronger attack from a vastly more enraged Eternal Sailor Moon (1) (2).

Now I don't use multipliers as a way of getting to a higher "level" or what have you. I only go into so much detail because I know Dragon Ball Super has a massive power scale above "baseline" universe level and so Beerus being massively above baseline universal does not mean he would be massively more powerful then Galaxia intrinsically. I don't know DBS's power scale nearly well enough to directly compare Galaxia's power scale to Beerus power scale so if someone wanted to do a more direct comparison, I hope this information is detailed enough. The quick summary is that Galaxia>>Galactica Sol Senshi who are to their Normal Versions what their Normal Versions are to civilians and their normal versions are relative to Base Eternal Sailor Moon who was likely well over 100,000 times her civilian self who was a league above the level of a casual universe maintainer like Queen Nehelenia. 

Speed:

Speed is a lot simpler. The Amazon Sailor Senshi are rookie Eternal Sailor Senshi much weaker then Galaxia so Galaxia should scale to them easily. They have moved comparable to the Lambda Power  taking the energy of their Star Seeds (1)(2)(3). The Lambda Power was quickly restoring all the star seeds to their proper places in the cosmos across the universe, and the power of the Silver Crystal is only a part of it. The power of the Silver Crystal has numerous times moved throughout and even to outside the universe instantly (1)(2) which is a speed just exceeding 1 quintillion times the speed of light. 

From quick research Beerus is hundreds of quadrillions of times the speed of light scaling off being 3/4th the speed of Whis which suggests that Galaxia maybe has a slight speed advantage, though not an unsurmountable one (about 3-4 times, well within the normal range of being able to react too). Pardon if I am mistaken on Beerus' speed, this was just what quick searches suggest.

Of course if you use vs battle wiki's speed standard, the light of the silver crystal has traveled across spacetime by raw speed which is immeasurable. It's merely an aspect of the Lambda Power which Eternal Amazons moved comparable too, showing immeasurable speed. 

Abilities:

Galaxia does not have the most versatile range of abilities of SM villains, but that's not to say she's unhax. It's moreso she has one extremely potent ability she is incredibly famous for: the Star Seed steal. The Star Seed Hax is arguably the most broken normal ability in the Sailor Moon Universe, with only two entities knowing it and Galaxia is a far greater user of it then Nehelenia. This is essentially a form of existence erasure hax that can one shot basically everyone in the verse. While users of the Silver Crystal are somewhat resistant to it, removing their star seed can still reduce them to a comatose state, it just doesn't completely kill and erase them immediatly. As both Galaxia and Beerus have a distinctive existence erasure ability and I believe some form of resistance, I believe the nature of the existence erasure and her resistance will become fairly relevant.

Galaxia's existence erasure is the ability granted by the Seikinseki or Sapphire Crystal, her Sailor Crystal. By Pointing towards something, Galaxia takes the Star Seed of that thing, and causes their erasure from existence. (1) All things that carry life have a Star Seed regardless of shape, size or name (1) and Galaxia's Star Seed stealing can work on things as large as planets (1), and implied even stars. Like a lot of things in Sailor Moon, the mechanics of the ability aren't explained heavily to retain a mystic air around it, but Star Seeds seem to refer to one's identity as an entity which is why Sailor Senshi have human star seeds which are their human identities and a Sailor Crystal representing their identies as Sailor Senshi. (1) It is known that even Chaos the conceptual entity had a star seed, called the Chaos Seed (1) suggesting Star Seeds are some form of conceptual existence. This is consistent with how Star Seed steal works on Sailor Saturn, (1) a sailor senshi with control over life and death and who can continue to exist as just a soul (1) or a spirit (1). Taking the star seed of someone also causes them to disappear across time. (1) Sailor Senshi in general possess resistance to existence erasure enough that in the second arc the Senshi were able to resist the Existence Erasure of Death Phantom (1), which was erasing the entire planet Earth (1)(2) and was even affecting the spiritual projection of King Endymion. (1).

So to summarize, Galaxia's Existence Erasure involves removing a conceptual piece of an enemy, their identity, can work on a planetary+, possibly stellar scale, can erase spiritual beings and is superior to an existence erasure that worked on a spiritual planetary scale. I don't know how this compares to Beerus's Hakai but there you go. 

After removing the star seeds of entities, Galaxia can then remake them so that they are loyal to her (1)(2) though this is not particularly helpful in a one on one match. There are a lot of other things Galaxia has been suggested to have done, but it's unclear whether this is a part of the same ability or not. Galaxia is noted to have forced people to serve her whim (1) but this clearly seems to be part of her star seed steal. She also killed all life on a binary planetary system by simply appearing on it, but it's unknown whether this is her sheer power, the power of the Sapphire Crystal, or some completely seperate ability. (1)

Sailor Galaxia has a bunch of other abilities. I'm gonna go over some of the more notable ones here and what potential relevance they may have. Some of them are not of the level where they're particularly notable. For instance the Sailor Senshi henshin can create a blinding light. Considering Beerus was unaffected at the center of a light that spread through the universe, that's unlikely to do anything. Some of Galaxia's abilities that are mote notable:

Dream Manipulation: Sailor Galaxia can enter into the dreams of others to threaten them there. (1)(2) This is unlikely to be particularly helpful as Beerus is probably not going to just fall asleep mid-combat. The only hypothetical advantage I can see from this is if there are neutral passerbys, Galaxia could hypothetically enter one of their dreams to avoid detection and launch a surprise attack,

Teleportation: Teleportation, even across dimensions and with other people is a common power of Sailor Senshi. (1) Sailor Galaxia has been shown to teleport personally (1) and is arguable the best teleporter in the series as she has also been shown to teleport many Sailor Crystals away from her (1) as well as teleport her entire castle. (1)(2) This may be helpful in a fight against Beerus, as teleportation was used by Goku to good effect against Beerus, though Sailor Teleport does not seem to be as precise as Instant Transmission. It also uses Henshin which suggests it may take energy since henshin is an emission of stellar energies. Both of these limitations can be seen in Chapter 3, when Ami and Luna told Usagi to transform in another dimension so Ami could lock onto her henshin energy and teleport there. (1)(2) I think Galaxia's teleportation is probably a fairly helpful ability, she could do things like teleport Beerus in front of his own attack for instance, but it's not something she would be able to spam like Goku did. She also can't use it for dimensional BFR because Dragon Ball characters on the level of Buu or above can perform the vice shout.

Galactica Inflation: One of Galaxia's two attacks. Galaxia creates a dark space around her filled with an electric aura. (1)(2). Depending how their power matches up should be damaging but lacks range.

Galactica Super String: Other of Galaxia's attacks. Galaxia creates a wave of cosmic force that is stronger then her prior attack. (1) There's no way to know how much stronger it is but it's basically the same in most cases, since it lacks range.

Attack Nullification: People with the bracelets worn by Galaxia and her minions can negate attacks with them. (1) Assuming Galaxia and Beerus are somewhat relative in power this would be pretty relevant actually as it would prohibit Beerus from using long ranged attacks. 

Can move through barriers: Galaxia can move through barriers (1)(2) as though they aren't there. This could be really strong or not at all strong depending on if you think this means she could just move through ki barriers. 

Clairvoyance: Galaxia can see distant events. (1) At a long range, this could be fairly helpful seeing her enemy without being seen.

Superhuman Senses: Sailor Senshi can sense energy and it's nature. (1) Galaxia sensed Usagi's intent to go to the center of the galaxy while Galaxia was at the center of the galaxy and Usagi was in the Solar System (1) and there's numerous showing of Sailor Senshi seeing and hearing at a cosmic distance. Lethe and Mnesmonye saw things in the Sol System from the Galaxy Center (1), the Outer Senshi saw the fall of the Moon Kingdom from the edge of the solar system and from outside spacetime (2) and the Amazon Senshi heard Usagi's call for help from Earth when Usagi was at the center of the Galaxy. (1) Other Senshi have also shown on a few occassions minor danger senses and senses of malice. (1)(2) This could be pretty helpful. I'm not sure if Galaxia could sense Beerus' ki since iirc God Ki is harder to sense then normal Ki but having constant awareness of where your opponent is for a cosmic level fight is a fairly helpful thing. If one of them gets blasted into the next star system, Galaxia would probably still be able to be aware of her relative position to Beerus' whereas I don't know if the inverse is true. He could have similar senses though in which case it goes from being an advantage to not being a disadvantage. Her danger/malice sense, if she has it, probably isn't a huge benefit, it might come in handy once or twice but isn't any kind of game-changer. It's certainly not Ultra Instinct or Spider-Sense. Her ability to hear intent from a cosmic distance may allow her to get a general sense of what Beerus' plan is but that's about it, which in fairness would probably be helpful. 

Telepathy: Galaxia can transmit images into people's mind to mess with them. (1) This is basically useless here. Galaxia has no prior knowledge of Beerus plus there's no one afaik that's close enough to Beerus and Beerus's personality isn't such that she can mentally torture him by transmitting images of his loved ones dying into his head like she did to Usagi. That was only somewhat effective on Usagi because Usagi is a sensitive girl and is very close to the Senshi. It's not even a combat tactic really since Galaxia was only doing it as part of her overarching goal to mentally torture Usagi until she released the full power of the Silver Crystal which could be used to destroy Chaos. 

Anti-Magic: Again, pretty useless here. Beerus doesn't use magic.

Stellar Energy: The energy Sailor Senshi uses. It can make energy blasts and shields and for the most part is basically just ki tactically. It's shown some exotic uses like breaking spells and enchanting normal items but nothing that will be hugely helpful in this fight.  

Stellar Protection: This is a metaphysical light that Sailor Senshi have introduced in the third arc that's sort of the blanket explanation for why they resist various haxes. Gonna be focusing on the haxes that Beerus have which my searches suggest are existence erasure, transmutation and sealing. Existence Erasure I already covered above, basically Galaxia scales to Planet+ and Spiritual level Existence Erasure resistance from the Death Phantom fight. Transmutation the best feat I can think of is Queen Metaria converted the moon from a vibrant planetoid of life to the cold rock it currently is (1) yet Sailor Moon survived within her (1). Now granted, this may not be fair, since that was Prime Metaria who converted the moon and Metaria was weakened during the fight with the Senshi. However even the Modern Metaria was at least able to convert the North Pole to stone (1) and Pharoah 90 who they fought later converted a continent sized section of the Earth into a strange black lava (1) so Galaxia should have some fairly strong transmutation resistance. Sealing is interesting though. There's nothing explict saying that Galaxia can resist sealing, though Sailor Moon could seal since the first arc (1) and couldn't beat Galaxia. So Galaxia might have sealing resistance but it's not something I would feel confident in. Stellar Protection gives resistance to a lot of haxes, these are just the ones that seem releavant

Galaxia Power Guardian: Galaxia like all Sailor Senshi should possess a Power Guardian, which is a small fairy that is part of her psyche and can manifest. (1) This can help perform minor functions like acting as another set of eyes to warn her of an incoming threat but they don't have a huge amount they can do. They can give their Senshi a power boost as seen near the end of Arc 4, so if Galaxia and Beerus get into a beam struggle, it might break a tie. But that's about it. 

Enhanced Intelligence: Galaxia's intelligence is very high for SM. She was able to know something intuitively even Sailor Cosmos did not know. (1)(2)(3) Sailor Cosmos has the intellect of the Mercury Crystal which scales being above the Perfect Daimon who had intelligence a hundred times that of a human. (1) Assuming this means an average human, this would be decently superhuman. She is also a skilled tactician who came up with unorthodox plans like having her Animamates go into the sol system undetected on shooting stars. All of Galaxia's plans in the series actually worked save for 2, both of which were stopped by the intervention of Sailor Cosmos, the God Tier of the series from the future Galaxia would have no way of planning for. I don't know how smart Beerus is but Galaxia should be decently superhumanly intelligent by scaling and has decent tactical feats.

Weaknesses:

So what's funny about Galaxia's weaknesses is the thing that is her weakness in universe is rarely ever gonna be relevant fighting against other verses, while the things that would be her actual weaknesses against other verses are things that never come up in the series.

So her weakness in series is that her devotion to her crystal of destruction is what keeps it from killing her and if she ever finds something that is worth protecting, her own crystal will erase her. (1) This would only come up if she was fighting against either someone who actually is just a super pure hearted completely noble character like Superman or Cardcaptor Sakura or Pacifist Frisk, or against some kind of incredibly good manipulator type character who can convince her something is worth protecting, whether they believe it or not. Beerus isn't really either of those archetypes so it doesn't really apply. 

In terms of actual weaknesses, it's less so things she has anti-feats for and more so things she lacks feats for. Most notably I think is stamina. All the villains in SM want the Silver Crystal because of it's endless energy. Usagi is the stamina fighter of her universe. Everyone that relies on a physical body that doesn't use the Silver Crystal has an issue of a lack of stamina feats. The Sailor Senshi have on several occassions run out of energy to the point of fainting after what can only be minutes of combat (1)(2) with Minako exerting herself fighting what basically amounted to 50 zombies (1)(2)(3). The best stamina feats Galaxia might scale to are Sailor V being unsure if she could fight 1.3 billion people (1) and Minako being able to keep fighting after losing 800 cc of blood. (1) Galaxia's stamina is probably somewhere between normal human and peak human, maybe low superhuman. Now granted it's fighting on a cosmic level so maybe it's not comparable but against someone in her cosmic weight class she would need to win fairly quickly or she'll just run out of energy. From what I understand Beerus is the inverse, often prolonging a fight out of enjoyment and getting stronger mid-fight via his anger. As such a prolonged fight would begin to favor him if Galaxia can't win quickly.

Also while Galaxia is super strong, cosmically super strong in fact, her strength is not at all enough to enough to hurt someone at her raw level of power. The best feat she would scale to is standing while inside a Black Hole, which is definitely impressive but basically irrelevant compared to characters who threaten the universe by punching each other. Sailor Senshi have unique gifts as Senshi and Sailor Jupiter's is basically having strength equivalent to her power level. 

On a related note Galaxia doesn't really have any feats for being a particularly skilled fighter. She's got feats for being a tactical general, but actual Sailor Moon fights tend to just be a clash of raw power or using a broken ability to win. She doesn't really have the raw skill of someone like Beerus.

Finally, Galaxia's attack range has never been shown to be that large. She can affect planets and likely star systems but she can't hit things on the other end of the universe like someone like Beerus can. This isn't a huge weakness afaik as she has teleportation that can make it so she can simply teleport within range at any point and she has sensory range to know where to teleport. That said it is something I felt I should note.

Other Versions:

So DB tends to do some odd composite versions at times so this is just a listing of what the Anime and Sera Myu add to Galaxia in case it's wanted. Sera Myu tends to add wacky powers to the characters, for instance Sailor Moon gained the ability to come back to life because the audience cheers for it. However for Galaxia it's more modest.

I'll go over Anime Galaxia first. I'll give a description of the relevant abilities and in parenthesis give the episode number.

Soul-Stealing: In the anime, Star Seeds are treated more like traditional souls. Galaxia can shoot soul-stealing blasts from her bracelets. These can be rapid fired (194) and can chase people around. (178) She took all the star seeds on Earth. (197)

Sealing: Galaxia in the distant past sealed Chaos within her (198)

Remote Teleportation: Galaxia teleported the Starlights into her Throne Room (196)

Darkness/Dark Energy Manipulation: Galaxia's presence darkened the sky. (195) Galaxia is stated to steal the brightness of planets and stars. (182) Creates a dark energy lightning field (195) as well as a whirlwind and a dragon out of dark energy. (200)

Energy-Sensing: Galaxia can sense energy on a galactic scale (189)

Energy Nullification: Nullifies energy (196-197)

Weapons: Galaxia uses an energy whip (197) and a sword (198)

Skill/Stamina: Anime Galaxia has actual stamina/skill feats as she fought Chaos for a long time before she sealed it within herself (198)

Can turn into Chaos Galaxia if her bracelets are destroyed, being possessed by Chaos and growing stronger (200)

Sera Myu, the Stage Musicals are divided into "stages" which are different continuities based on which actresses are playing the senshi. Sailor Galaxia appears in 8 stage musicals. In this first stage she demonstrates along with some of the above:

Galactica Magnum: An attack technique. It's somewhat unclear what it does. (Eien Densetsu Kaiteiban)

Space Manipulation: Trapped Usagi in subspace where she could not transform. (Sailor Stars Kaiteiban)

Implied Time Travel: Captured Neo-Queen Serenity who exists in the future (Sailor Stars Kaiteiban)

Sealing Destruction: Broke the seal on Queen Beryl (Eien Densetsu Kaiteiban)

Conceptual Attacks: Fought Chaos for a long time and harmed it with an attack, harmed Queen Beryl who had prior merged with the concept of hatred (Eien Densetsu Kaiteban)

The Second Stage is fairly similar to First Stage so it's mostly the same abilities with the only additions being

Resurrection: Resurrected the Amazon Trio (Shin Densetsu Kourin) and the Heavenly King. (Starlights-Ryuusei Densetsu) This was already implied in First Stage but this makes it a lot more clear. 

Galaxia also appeared in the Fourth Stage Musical Le Mouvement Final though there is no place to watch this legally due to it's recency. 

The Anime and the Musicals also added a bunch of direct universal feats for Galaxia if wanted like Anime Galaxia being stated to be a threat to the universe (178) and it being stated in Sera Myu that if Galaxia and Eternal Sailor Moon clashed their power might destroy the universe accidentally (numerous musicals but first mentioned in Sailor Stars and it's Kaiteban)

Some Debunks:

Finally this is a section to debunk some common misconceptions

Sailor Galaxia can not be galaxy level:

So this comes from two points. One being Galaxia stating she knew it was impossible for her to win against Chaos when Chaos was the size of the galactic center. (1) However Chaos is a living entity with it's own powers. A character's power is not determined solely by their size. Otherwise Godzilla and his enemies could not be any stronger then large building to city block level and Ego the Living Planet from Marvel would be limited to planet level when he can fight Galactus. Chaos' size is not some kind of limitation on it's power.

The other point this comes from is Galaxia, near the apex of her plan when she is going to soon get the Silver Crystal, says the time has come to create a new galaxy, suggesting she couldn't create a galaxy beforehand. (1) There's a lot of problems with this argument but to over just a few:

A: Japanese doesn't have a normal singular/plural distinction, so what Galaxia was stating would be more properly "The time has come to create new galaxy/galaxies..." Also, Chaos on literally the next page states that the time has come to form a new universe. (1)

B: Galaxia never actually expresses a limitation in this page, she is just stating that the time has come to create something.

C: Far more importantly, Galaxia is not a creator being, she is the Sailor Senshi of Destruction, thematically and literally. All of the planets under Galaxia's control are barren wastelands, similar to Galaxia's home planet. (1) She was seeking the Silver Crystal which creates to gain complete control of the universe. (1)(2) Galaxia probably can't create a planet as well, but no one uses this to argue she is sub-planetary. Galaxia simply does not have creation as part of her powerset, not just for circumstantial lack of evidence but because having creation is against her role in the story. So yeah, her not being able to create something is not evidence of her lack of power. 

Sailor Galaxia would lose because she is arrogant:

Galaxia as a person is, in fact, arrogant, thinking she is the chosen one (1) however unlike a lot of villains that are arrogant, she doesn't allow this to interfere with her tactics. It's not a combat applicable weakness. Galaxia always goes for her strongest move, her star seed steal, first. As mentioned above, all of Galaxia's plans work except for the two that involve intereference by the God Tier of the verse Galaxia would have no way to anticipate. Galaxia is fully aware of Chaos being stronger then her and it being impossible for her to beat it. (1) Galaxia spent the entire arc mentally torturing Usagi so she would release her full power and kill Chaos. (1)(2) 

VS battles wiki claims Galaxia has arrogance and complacency as weaknesses because Chaos was manipulating her into doing what it wanted planning to betray her the entire team. However

A: I don't know where they are getting this. Galaxia was planning to betray Chaos and Chaos merely retailiated after it became aware of that.

B: Even taking that at face, what was Galaxia supposed to do about it? Her plan should have worked regardless and would have if Sailor Cosmos hadn't stopped Galaxia from pushing Usagi into the Galaxy Cauldron

Galaxia is absolutely not complacent. She is constantly getting directly involved with her plans which is partially why they have such a high success rating. When Usagi destroyed Lead Crow fast enough that Lead Crow couldn't take Mars and Venus Sailor Crystals, Galaxia just popped in and took them herself. (1)(2)

Galaxia is arrogant in the same way that Darkseid is arrogant. They are arrogant in their personality, and narratively speaking in their goals, but they don't have arrogance as a weakness because it simply doesn't effect their decision making process.

Galaxia wins because she has powerful regen and immortality

So this is based on two points. The easier of these to debunk is Galaxia stating that Senshi can endlessly return so long as their Star Seeds remain. (1) This is completely removing the context of the scene, however. Galaxia just made Usagi fight her brainwashed friends and is taunting her with how she can endlessly revive Usagi's friends and force them to fight. (1)(2) Galaxia is using this as a way to rebuke Usagi's philosphy by saying that things like love and friendship are only temporary illusions and moveover to mentally torture Usagi so she will get closer to releasing the full power of the Silver Crystal. There'd be no reason for Galaxia to torture Usagi with a simple fact about the supposed general regenerative propery of Sailor Senshi. Galaxia is just talking about her own ability to recreate the bodies of those she's taken the star seeds off.

The other is a bit harder to get into. Basically it's mentioned that if Hotaru awoke as a Sailor Senshi, her power as a Sailor Senshi will regenerate her (1) and later in the arc after Hotaru awakens it regenerates her body and soul. Now while Hotaru does have pretty strong regeneration, I personally thought it was pretty clear this was specifically an ability of Hotaru as the Sailor Senshi presiding over life and death. (1) This is why she has healing even in her civilian form (1) and her attacks as a Senshi are focused around death manipulation. There's no real evidence suggesting that this regen applies to the rest of the Senshi and Senshi have been threatened by completely normal if extremely powerful physical attacks including, for instance, really powerful explosions. (1)

Galaxia has general purpose Power Nullification:

A claim that's gone around is that Galaxia and her minions have power nullification because Tin Nyanko launched an energy blast that took away the Mautians ability to speak in their cat forms. (1)(2) Howewer the text suggests this was related to the damage to the crescent moons on their foreheads. These markings on their foreheads are very important to the Mautions as shown in Act 1. Luna had her crescent moon covered by a bandage and could not use her locator abilities or speak. (1) As such it was likely more a matter of the Mautians biology rather then some ability of Galaxia and her Animamates that nobody ever addresses and never comes up in any other situation.