Discussion Fairy Tail Power Ranking Thread

[Ronin31]

Yes, Kurumi. There is no buff against Dragon Slayers.

Too tired to compute trolling or sarcasm lol.

Bcs a Slayer sword > a non slayer sword just like Slayer magic > Non Slayer magic (with their respective element ofc). Gray's ice devil slayer magic did better damage than her DSword lol. DSeal gives no slayer boost, it just lets her enchant DS magic into her weapons to make them stronger.

DS magic has no advantages against Dragon Slayers, only Dragons. DS aren't dragons lol.

--- Double Post Merged, Apr 5, 2021, Original Post Date: Apr 5, 2021 ---

How do you guys come up with DS magic being advantageous over Dragon Slayers who are humans? Are you guys seriously so hellbent on Erza =/= Laxus that you'll make up stuff like DS magic being advantageous against humans? Laxus should have oneshotted Natsu if he had Slayer advantage against him in BoF. Same with Natsu vs Gajeel. Same with Natsu v. the Twins.

Oh is ice devil slayer magic also advantageous over Dragon Slayers since it did the same damage to Laxus as a fire dragon slayer sword?

Dragon Slayer magic is only super effective against actual Dragons. Dragon Slayers are not Dragons unless they go through the process of Dragonification. Here is your resident Dragon Slayer explaining he is human and his imaginary foster dragon daddy agreeing with that sentiment.

Spoiler

They only search excuses with Erza's dummy power up to put Laxus "stronger" than her. The fact is that Erza had more handicap in the fight. But battle's circumstances are negligeable when they are in Laxus's favor (brainwatched when Erza fought a friend, all enhanced stats by Erza's statements, restore with a chapter on it).

Still, scans' statements (3) proof the tie. Nothing else to say.

 

[GL_Nova]

Yes, Kurumi. There is no buff against Dragon Slayers.

Too tired to compute trolling or sarcasm lol.

Bcs a Slayer sword > a non slayer sword just like Slayer magic > Non Slayer magic (with their respective element ofc). Gray's ice devil slayer magic did better damage than her DSword lol. DSeal gives no slayer boost, it just lets her enchant DS magic into her weapons to make them stronger.

DS magic has no advantages against Dragon Slayers, only Dragons. DS aren't dragons lol.

--- Double Post Merged, Apr 5, 2021, Original Post Date: Apr 5, 2021 ---

How do you guys come up with DS magic being advantageous over Dragon Slayers who are humans? Are you guys seriously so hellbent on Erza =/= Laxus that you'll make up stuff like DS magic being advantageous against humans? Laxus should have oneshotted Natsu if he had Slayer advantage against him in BoF. Same with Natsu vs Gajeel. Same with Natsu v. the Twins.

Oh is ice devil slayer magic also advantageous over Dragon Slayers since it did the same damage to Laxus as a fire dragon slayer sword?

Dragon Slayer magic is only super effective against actual Dragons. Dragon Slayers are not Dragons unless they go through the process of Dragonification. Here is your resident Dragon Slayer explaining he is human and his imaginary foster dragon daddy agreeing with that sentiment.

Spoiler

What are you talking about? It was established back when Natsu and Gajeel faced Laxus that taking a bunch of Dragon magic was a big feat. An the reveal that Laxus was a DS was the explanation for how he could handle all of it. We have been told over and over that only DS magic works on dragons. There is nothing to suggest DS magic is especially effective? We have an entire manga that has treated Slayers as a specialized type of soldier, that in most cases is expected to win. Erza was quite clear about her intention to use the advantage of her sword against Kiria. She made a point again of using her DS sword and a DS buff to replace the edge against Laxus she expected from her lightning armor. This ain’t just about Laxus vs Erza. It’s been established how well slaying magic works against the target. It’s been bludgeoned into us the entire series.
Why now are we suddenly trying to act like DS magic isn’t a boost to stats for whomever we see with it. Hell Gray literally just whooped the Raijin Tribe with only the physical buff slayer magic grants. An there is literally no ability had by other slayers that DS don’t enjoy. Not a single one, so arguing there is no buff... looks real preferential. Your now arguing that Erza recieved absolutely no benefits from the spell and made a point of revealing/relying on it because of what? If she gains no advantage. Why use the DS sword? This is Erza, literal Fairy Queen of dress for the occasion.

--- Double Post Merged, Apr 5, 2021 ---

They only search excuses with Erza's dummy power up to put Laxus "stronger" than her. The fact is that Erza had more handicap in the fight. But battle's circumstances are negligeable when they are in Laxus's favor (brainwatched when Erza fought a friend, all enhanced stats by Erza's statements, restore with a chapter on it).

Still, scans' statements (3) proof the tie. Nothing else to say.

Yet. You still can’t seem to convince the majority. An it’s no different than your insistence that Erza’s wrongly informed decision to hold back counts as some massive handicap. As opposed to her needing to acknowledge she needed every trick in her toolbox to rock with Laxus in the ring. Everybody has an angle. Hence why nobody is upset you keep reading some tie in between the lines.

 

[bugen]

Regarding the "advantage" of the DS seal.

The seal of DS is a new ability for Erza, she learned it from Wendy just like with the master enchantment sword.

If it is a technique of hers, she is free to use it against the enemy she wants.

I do not consider it an advantage, as it is an ability of hers, like the Nakagami armor that she did not want to use.

She is free to use her armors and abilities as she wants or deems necessary.

To say that Erza has an advantage for using the DS seal is totally wrong, since it is to deny an ability of her.

There is nothing wrong with using a technique of her own.

It is not that Wendy has given her magic as she did in her confrontation with Irene, it is not like that, Erza learned the technique and she used it because she saw fit, just like the master enchantment.

 

[Ronin31]

why nobody is upset you keep reading some tie in between the lines

Perhaps because it was not reading between the lines when Kyria said the "two monsters beat out each other".

Spoiler: Tie

--- Double Post Merged, Apr 5, 2021, Original Post Date: Apr 5, 2021 ---

I give you another one if you want. Read it please : it's not between the lines.

Spoiler: Tie

[/SPOILER]

--- Double Post Merged, Apr 5, 2021 ---

Hell Gray literally just whooped the Raijin Tribe with only the physical buff slayer magic grants.

Agree for gray's enhance stats in Devil Slayer. Still Gray is a bad exemple as his Devil Form enhance his stats while he lost his mental sanity. It's unique Devil Slayer's properties. A two blade weapon. He is like Natsu who enhance his fire magic with his "Flame of Emotion". It's unique Propertie as I can't see Gajeel doing the same.

Spoiler: Devil Slayer property

View media item 24943

Even so, is Erza a Slayer ??

She only used a Dragon Slayer's Blade here. A tool. Like when she enchants Devil Slayer and Dragon Slayer's abilities inside her dual blade. Are you trying to say that Erza's physical stats are up like Gray who is a real Slayer since he inherits it from his father, with unique property ?

Dragon Slayer is a Magic create to kill Dragons. Devil Slayer is a Magic create to kill Demons. God Slayers is a Magic create to kill Gods.
Where are humans here ?

When I see the picture of Devil Slayer + Dragon Slayer slashes on Laxus's body, I can't see the damage's gap. If you are right, the side damage by Dragon Blade should deal far more than Devil Blade. No ? The fact is that the gap is minima.

Even without enchants, no Dragon Slayer or Devil Slayer "power up", she matched Raiko with Blumenblatt.

 

[Nie Li]

Regarding the "advantage" of the DS seal.

The seal of DS is a new ability for Erza, she learned it from Wendy just like with the master enchantment sword.

If it is a technique of hers, she is free to use it against the enemy she wants.

I do not consider it an advantage, as it is an ability of hers, like the Nakagami armor that she did not want to use.

She is free to use her armors and abilities as she wants or deems necessary.

To say that Erza has an advantage for using the DS seal is totally wrong, since it is to deny an ability of her.

There is nothing wrong with using a technique of her own.

It is not that Wendy has given her magic as she did in her confrontation with Irene, it is not like that, Erza learned the technique and she used it because she saw fit, just like the master enchantment.

It's an advantage, what is not is an unfair advantage. Just an "elemental" advantage. A properties advantage.

It's like using a water spell to put out a fire spell. It's an elemental advantage, yet in no way unfair. It's smart to take profit of things like that. That is not to say Erza needed to make use of dragon slayer magic to hurt or to defeat Laxus, but why not take advantage of Laxus' magical properties? She did. Laxus "dragonizes" himself partially to tank damage, just like he "dragonizes" himself to throw his DS lightning spells. That is what DS magic is all about. He is a human, but making use of dragon skills makes him vulnerable to other dragon skills. Indeed, dragon slayers are more efficient against each other just like they are against dragons, or just like dragons are against dragons.

Nothing wrong with that.

 

[bugen]

It's an advantage, what is not is an unfair advantage. Just an "elemental" advantage. A properties advantage.

It's like using a water spell to put out a fire spell. It's an elemental advantage, yet in no way unfair. It's smart to take profit of things like that. That is not to say Erza needed to make use of dragon slayer magic to hurt or to defeat Laxus, but why not take advantage of Laxus' magical properties? She did. Laxus "dragonizes" himself partially to tank damage, just like he "dragonizes" himself to throw his DS lightning spells. That is what DS magic is all about. He is a human, but making use of dragon skills makes him vulnerable to other dragon skills. Indeed, dragon slayers are more efficient against each other just like they are against dragons, or just like dragons are against dragons.

Nothing wrong with that.

Exactly.

Thats what I refer.

That is why I emphasize not calling it an advantage.

I would call an advantage if that stamp was loaned, but it is not the case, since she learned it herself.

She may have "advantage" in using the seal, but being a magic of herself it is not "unfair".

Good example Gray vs Natsu, both have an advantage over each other, but being the magic of each user it is not unfair at all.

I'm glad was understood.

 

[Jko]

What are you talking about? It was established back when Natsu and Gajeel faced Laxus that taking a bunch of Dragon magic was a big feat. An the reveal that Laxus was a DS was the explanation for how he could handle all of it. We have been told over and over that only DS magic works on dragons. There is nothing to suggest DS magic is especially effective? We have an entire manga that has treated Slayers as a specialized type of soldier, that in most cases is expected to win. Erza was quite clear about her intention to use the advantage of her sword against Kiria. She made a point again of using her DS sword and a DS buff to replace the edge against Laxus she expected from her lightning armor. This ain’t just about Laxus vs Erza. It’s been established how well slaying magic works against the target. It’s been bludgeoned into us the entire series.
Why now are we suddenly trying to act like DS magic isn’t a boost to stats for whomever we see with it. Hell Gray literally just whooped the Raijin Tribe with only the physical buff slayer magic grants. An there is literally no ability had by other slayers that DS don’t enjoy. Not a single one, so arguing there is no buff... looks real preferential. Your now arguing that Erza recieved absolutely no benefits from the spell and made a point of revealing/relying on it because of what? If she gains no advantage. Why use the DS sword? This is Erza, literal Fairy Queen of dress for the occasion.

--- Double Post Merged, Apr 5, 2021 ---

Yet. You still can’t seem to convince the majority. An it’s no different than your insistence that Erza’s wrongly informed decision to hold back counts as some massive handicap. As opposed to her needing to acknowledge she needed every trick in her toolbox to rock with Laxus in the ring. Everybody has an angle. Hence why nobody is upset you keep reading some tie in between the lines.

DS magic only works on Dragons, this was stated over and over again. Slayer magic itself is only advantageous over their respective species. Humans are not Dragons ergo Dragon Slayers are not effected by DS magic more than any other human. There was zero emphasis of this in BoF. It was just shocking Laxus was a DS. Kiria was just used to show off Erza having a new sword. There was nothing about the sword being more effective on Kiria bcs she is a DS. Natsu v. Gajeel had zero emphasis of slayer advantage. You guys are straight up reading fanfiction at this point. No, it was Erza v Laxus that stemmed this, frankly, dumbass theory that DS are advantageous over DS.

Erza received no benefits from it but a stronger sword. You have proven zilch that her stats were effected, and now you are making straight up bs stuff like DS magic is advantageous over humans. Gray demonizes in order to get stronger, it's not just bcs he has slayer magic.

Ice DeS magic did as much damage on Laxus as Fire DS magic so again, is ice DeS magic advantageous over Dragon Slayers too? Is every magic simply advantageous over Dragon Slayers??? Dragon Slayers would be straight up oneshotting each other if DS magic was advantageous against them.

Erza had no advantages in the fight since there were no advantages stated, and the fight was tie as stated by both spectators and the author. Anything other than that is a Mr. Fantastic level reach.

 

[Ramen]

DS magic only works on Dragons, this was stated over and over again. Slayer magic itself is only advantageous over their respective species. Humans are not Dragons ergo Dragon Slayers are not effected by DS magic more than any other human. There was zero emphasis of this in BoF. It was just shocking Laxus was a DS. Kiria was just used to show off Erza having a new sword. There was nothing about the sword being more effective on Kiria bcs she is a DS. Natsu v. Gajeel had zero emphasis of slayer advantage. You guys are straight up reading fanfiction at this point. No, it was Erza v Laxus that stemmed this, frankly, dumbass theory that DS are advantageous over DS.

Erza received no benefits from it but a stronger sword. You have proven zilch that her stats were effected, and now you are making straight up bs stuff like DS magic is advantageous over humans. Gray demonizes in order to get stronger, it's not just bcs he has slayer magic.

Ice DeS magic did as much damage on Laxus as Fire DS magic so again, is ice DeS magic advantageous over Dragon Slayers too? Is every magic simply advantageous over Dragon Slayers??? Dragon Slayers would be straight up oneshotting each other if DS magic was advantageous against them.

Erza had no advantages in the fight since there were no advantages stated, and the fight was tie as stated by both spectators and the author. Anything other than that is a Mr. Fantastic level reach.

Emperor99 on CV wildin eh?

 

[Jko]

Emperor99 on CV wildin eh?

Lol, I tried not to get involved w/them. And you thought I was a Mira fanboy

 

[Ramen]

Lol, I tried not to get involved w/them. And you thought I was a Mira fanboy

Makes you look like a casual.

 

[Axiomus]

All dragons have the same weakness to dragon slaying magic as demons have to devil slaying magic. God Dragons simply have high enough durability that even with that, even with weakness to slayer magic factored in, they can still tank multiple attacks from each other and no-sell attacks from Natsu or Erza level dragon slayers. This effectively means their stats outweigh their vulnerability to slayer magic. At least, against any Dragon Slayer we can name.

Humans aren't vulnerable to dragon slaying magic. At least, not without dragonizing. Erza's dragon slaying swords don't have any special advantages over Laxus. They just hit harder.

Dragon Slaying seal gives your magic the properties of dragon slaying magic, which boils down to the power of a dragon. This is almost certainly a power up. The same enchantment given to a sword would be considered a power up for that sword.

Gray's half demonized form is basically the equivalent to Dragon Force. It demonized Gray's body for an increase in physical stats. It's not the equivalent to Flames of Emotion. Insanity is a side effect of using Devil Slayer, not the source of power.

 

[Ronin31]

Gray's half demonized form is basically the equivalent to Dragon Force. It demonized Gray's body for an increase in physical stats. It's not the equivalent to Flames of Emotion. Insanity is a side effect of using Devil Slayer, not the source of power.

I half agree. Yes it demonized Gray's body for an increase in physical stats, exactly like Dragon Force. I also agree that Insanity is a side effect of using Devil Slayer. But when you say it's not equivalent to "Flame of Emotion", I don't know why.

With Rage, Natsu enhances his magic powers to an upper level because he stops holding back until unleashing all his might without restriction in Dragon Force. Devil Slayer Mode taints Gray's heart into Darkness making him loosing control of his own humanity. Loosing control, he stops holding back in process, same as Natsu, until what we saw in Arbaless. He gradually grows stronger the time he stays in this form in analogy of loosing his mental sanity. Devil Slayer makes a direct analogy with Biblical's Devil Pact : Devil corrupts human heart and soul in exchange to wish of power. So yes, insanity is the source of his upper power.

In Arbaless, Dimaria's action on Lucy accelarated the process for Natsu (END rised). Invel did the same for Gray.

Both are fuel by Rage and Emotions :
- dark emotions for Gray as he grows gradually as a demon in this Mode.
- Usually rage with feeling to save his people for Natsu as he grows gradually as a human dragon (the process was sealed by Igneel so he can't loose his humanity) in this Mode.

But in Process, both are Berserker's like : growing gradually stronger while loosing their control. Or are you telling that 100YQ Gray facing Skullion was as strong as when he faced END ?

Into this Process, I can also put Erza. Her true powers are fuel by her emotions, her desire to protect and save her people even if she has to die for. Circumstances only accelerate the process.

 

[Axiomus]

I half agree. Yes it demonized Gray's body for an increase in physical stats, exactly like Dragon Force. I also agree that Insanity is a side effect of using Devil Slayer. But when you say it's not equivalent to "Flame of Emotion", I don't know why.

With Rage, Natsu enhances his magic powers to an upper level because he stops holding back until unleashing all his might without restriction in Dragon Force. Devil Slayer Mode taints Gray's heart into Darkness making him loosing control of his own humanity. Loosing control, he stops holding back in process, same as Natsu, until what we saw in Arbaless. He gradually grows stronger the time he stays in this form in analogy of loosing his mental sanity. Devil Slayer makes a direct analogy with Biblical's Devil Pact : Devil corrupts human heart and soul in exchange to wish of power. So yes, insanity is the source of his upper power.

In Arbaless, Dimaria's action on Lucy accelarated the process for Natsu (END rised). Invel did the same for Gray.

Both are fuel by Rage and Emotions :
- dark emotions for Gray as he grows gradually as a demon in this Mode.
- Usually rage with feeling to save his people for Natsu as he grows gradually as a human dragon (the process was sealed by Igneel so he can't loose his humanity) in this Mode.

But in Process, both are Berserker's like : growing gradually stronger while loosing their control. Or are you telling that 100YQ Gray facing Skullion was as strong as when he faced END ?

Into this Process, I can also put Erza. Her true powers are fuel by her emotions, her desire to protect and save her people even if she has to die for. Circumstances only accelerate the process.

Because they don't work the same way.

Flames of Emotions converts emotions directly into MP. Going insane doesn't make Gray stronger.

Darkness can be a source of power, and it definitely makes Gray stronger. But Gray doesn't have to go insane to use darkness. I suppose you can argue that devil slaying magic making people go insane can make them more likely to use darkness, but that's not the same as saying insanity is the source of Gray's power.

 

[Ronin31]

Darkness can be a source of power, and it definitely makes Gray stronger. But Gray doesn't have to go insane to use darkness. I suppose you can argue that devil slaying magic making people go insane can make them more likely to use darkness, but that's not the same as saying insanity is the source of Gray's power.

Yes, like I said, it's gradually. He can use Devil Slayer while remaining control but not for too long. His Darkness "eats" his soul and heart until making him insane as a result. In that process, Darkness feelings make by Devil Slayer's corruption gradually enhances his MP by feelings, just like Natsu with anger. For me, insanity is the climax's result of this overflow as he can't no longer control it. I can see this Gray (insane) like Natsu in Dragon Force who unleashes his wrath.

For me, it's Berserker's process for both. And circumstances can accelerate the process.

I hope we'll see Gray at his best in 100YQ, like he did vs Invel and END.

 

[Axiomus]

Yes, like I said, it's gradually. He can use Devil Slayer while remaining control but not for too long. His Darkness "eats" his soul and heart until making him insane as a result. In that process, Darkness feelings make by Devil Slayer's corruption gradually enhances his MP by feelings, just like Natsu with anger. For me, insanity is the climax's result of this overflow as he can't no longer control it. I can see this Gray (insane) like Natsu in Dragon Force who unleashes his wrath.

For me, it's Berserker's process for both. And circumstances can accelerate the process.

I hope we'll see Gray at his best in 100YQ, like he did vs Invel and END.

Using devil slaying magic doesn't necessarily lead to darkness. The reason why Gray had darkness was because of what happened to Silver, Ur, and Ultear. What ultimately set it off was Juvia's fake death. Devil slaying magic causes insanity, which may have made it more likely to Gray's heart to have darkness when bad stuff happens....but the bad stuff will have to still happen. Also, Darkness is more like POF than flames of emotions. In that it's a source of power that anyone can tap into. Flames of Emotions is an actual property of Natsu's magic. As far as know, it's exclusive to the dragon slaying magic taught by Igneel.

Demonization = Dragonization (Dragon Force)
Going insane = Physical discomfort adjusting to new senses
Darkness (power of negative emotions) = Power of emotions related to love

 

[Ronin31]

I agree.

Can you tell me the difference between "Flames of Emotions" and "PoF" ?
Natsu's rage enhances his Magic and Heat's Fire so it's a Power of Feeling as well. Just like Erza when she wants to save people and turns nearly unstoppable (Power of Love) and yes Gray's Darkness is also PoF with negative feelings. I don't see the difference between Erza and Gray with Natsu. Only the Feeling's Nature is different but remain the same fonctions for the characters.

Yes, Gray has darkness with all traumas, like Erza had in her heart when she hides under her armors, and this is why she is so strong under circumstances as she didn't want to fail to save people anymone, like she did as a child. But I still think Devil Slayer's mode feeds him and puts him gradually more into his darkness until loosing control. Agree that going insane can be a physical discomfort, but I think it's more psychological, like facing his nightmares inside.

View media item 24943

 

[Axiomus]

I agree.

Can you tell me the difference between "Flames of Emotions" and "PoF" ?
Natsu's rage enhances his Magic and Heat's Fire so it's a Power of Feeling as well. Just like Erza when she wants to save people and turns nearly unstoppable (Power of Love) and yes Gray's Darkness is also PoF with negative feelings. I don't see the difference between Erza and Gray with Natsu. Only the Feeling's Nature is different but remain the same fonctions for the characters.

Yes, Gray has darkness with all traumas, like Erza had in her heart when she hides under her armors, and this is why she is so strong under circumstances as she didn't want to fail to save people anymone, like she did as a child. But I still think Devil Slayer's mode feeds him and puts him gradually more into his darkness until loosing control. Agree that going insane can be a physical discomfort, but I think it's more psychological, like facing his nightmares inside.

View media item 24943

Power of emotions is available to everyone because magic power comes from love. You know when characters sometimes "connect hearts" and start hearing voices of their loved ones? That's our cue for when a character is using power of emotions.

Flames of emotions is an actual type of fire magic. Functionally, it does pretty much the same thing as power of emotions. Flames of emotion is in play basically every time Natsu uses fire, because it's the magic he's using, whereas power of emotions isn't as predictable to trigger.

 

[WoWfan]

Some Magics Have exceptions such As black magic with darkness inside of them and Curse power which is fueled by negative emotions.

and Flames of Emotions are to increase the intensity of his flame’s heat, not necesarily the same as power of feelings which makes one stronger.

 

[CaptainTorch]

There's one point in the series I always wasn't sure on how to perceive.

After the 7 year timeskip, when the team got their 2nd origin unlocked, it seemed like Erza was the only one not affected by Ultear's magic.

Later on during the GMG, we see her releasing 2nd origin, implying that she wasn't using it before.

So does this mean that Erza during early GMG has the same strength as during Tenrou? This would seem weird, since as seen in the confrontation of Natsu vs Max, ALL of team Natsu was quite behind in terms of power, and needed to powerup.

If Erza indeed stayed the same, then she really didn't need to powerup, since even her "Tenrou self" was on par with Kagura, who is one of the top fighters in GMG.

Another counterpoint to this theory is the fact that Bacchus was said to be PreSkip Erza's equal, and later on we see that he is quite below the likes of Kagura & Erza.

Also, did Erza even get stronger after activating her 2nd origin? It didn't seem to change much except for her being able to summon Nakagami armor.

What do you guys think?

 

[Ronin31]

Power of emotions is available to everyone because magic power comes from love. You know when characters sometimes "connect hearts" and start hearing voices of their loved ones? That's our cue for when a character is using power of emotions.

Flames of emotions is an actual type of fire magic. Functionally, it does pretty much the same thing as power of emotions. Flames of emotion is in play basically every time Natsu uses fire, because it's the magic he's using, whereas power of emotions isn't as predictable to trigger.

and Flames of Emotions are to increase the intensity of his flame’s heat, not necesarily the same as power of feelings which makes one stronger.

Love is not the only feeling.
- Refusing to fail saving people anymore is Erza's feeling to boost her power. It climax with Love for her people.
- Darkness, pain and anger are Gray's feeling to boost his power. It climax with Love for his People.
- Rage is Natsu's feeling to boost his power. It climax with Love for his people.

All are PoF. It's not only about earing People's voices inside you. It's Resolution and Determination's Power to break through a Wall. Of course the Climax of this power is Love as the first Magic is Love. PoF is, by definition, to break a Wall for saving friends and lovers, which push the character to do an impossible thing from his classic stats.

Natsu's magic is not different. His fuel is his anger. Anger is emotion. More he enters in wrath, more his fire is hot until changing in Dragon Force, his climax one. Increasing the intensity of the Heat increases Fire Magic of the Fire Dragon Slayer one. So his anger makes him stronger. Just like Pain and Darkness for Gray or Resolution for Erza. PoF is a boost of stats. Love is the Climax feeling because people are not strong for himself/herself, but for others. This is the meaning of Fairy Tail. And Erza's explanation to Azuma when she answers him about her strength.

Still, the name itself speaks for it : "Flames of EMOTION".

Flame of Emotion is Natsu's climax PoF : ultimate Wrath combine with Love (to save people until sacrifice a arm in action).
Just like Erza facing Deus Sema : ultimate Determination to unfail to save people (Trauma from childhood inside the Tower of Heaven) with Love (she is ready to suicide herself for her friends).

I think yes everyone can tap into PoF to boost stats like Adrenaline. But only few can climax until play their own life for others. As exemple, Gajeel couldn't do a move to protect Reby who is pregnant in front of Natsu. Yes, he was injured and no MP but still. By analogy, Erza could only move one arm facing Deus Sema and used it as a suicidal weapon for her friends. That is the difference between characters.

The climax level also depends on their "hidden potential". Erza and Natsu have huge hidden potential. And I think Gray as well as he rivaled END.