Part 1:
I'll begin with anyone can RP however they wish to... however, from a purely lore standpoint, it would be highly unlikely to become a master of all schools of magic. Also something to note, conjury is not the same thing as white magic. Thaumaturgy is not the same as black magic. The methodology of Arcanima is closely related to Scholar and Summoner, but also note that these are also three different magicks from three different time periods. So when you say you want to master all schools of magic, be aware that there aren't just three... there are closer to seven. Eight if you count the coming Astrologian, which we don't know much about yet.
Summoning was a magic practiced and perfected by the ancient Allagans 5000 years ago. It was likely the forefather of modern day Arcanima. Summoners would draw upon the absorbed spirit of defeated Primals of eld and conjure an essence or Egi of that Primal which had been bent to the caster's will.
Scholar, unlike its Summoning and Arcanima relatives is actually less a summoning art. Scholars created strong bonds with an Elemental-like creature called a Fairy or Fae. Also unlike Summoners and Arcanists, the Scholars of Nym focused on restorative magics and drew upon their own skills and the magicks of their Fae to cure their allies. However, after the plague befell Nym, the Scholars lost their ability to communicate with their Fae and evoke their magicks and Scholar was lost for the next 1600 years.
Arcanima is likely descendant from bits of Summoning and Scholarly magic. Like their predecessors, Arcanists draw and channel their magic through geometric shapes and patterns aided by specialized inks which amplify their energies. Using their own aether, Arcanists can call forth a Familiar called Carbuncle to aid them, likely left over from Summoning days.
Thaumaturgy is believed to be the original form of magic of the 5th Astral Era, close to 3000 years ago. Thaumaturgy draws from the caster's own aether and focuses the spell through a gemstone medium to cast. Over the centuries, Thaumaturgy took a dark turn and became a magic focused upon death. Skilled wielders of the magic were able to do incredible things, such as return people from Thal's realm. When Ul'dah and Sil'dih rose from the ashes of Belah'dia, Thaumaturgy took on the duality of the Traders, Nald'thal, and became the study of life and death. The religious Order of Nald'thal was formed with the belief that by using Thaumaturgy to more deeply understand Death, they might better be able to understand and appreciate Life.
Black Magic, by contrast, is actually a technique, not a true form of Magic. In the early years of the 5th Astral Era, a young Magi named Shatotto wished to further the limitations of Thaumaturgy, but was ultimately unable to perform the magicks she wished to due to her own limited aether supply. So she devised a method to curb the Lifestream and draw upon the aether of the planet instead of her own. This technique was coined "Black Magic" as it killed the land around the caster, but it afforded Shatotto unlimited power and paved the way for the War of the Magi centuries later. By the time the War of the Magi broke out at the end of the 5th Astral Era, Black Magic was capable of many incredible feats - bringing down stars, animating inanimate objects, and tearing holes in our Physical Plane, opening a portal to the Void and drawing forth unimaginable demons upon the world. However, by the end of the War, Black Mages had drained the world entirely of its aether and had nearly killed the planet. Because of this unlimited destructive force, Black Magic was forbidden and strictly outlawed.
White Magic or Succor is the magic of the Elementals. Around the middle of the 5th Astral Era, it was gifted to the Amdaporians to balance the destructive power wrought by Shatotto's Black Magic. These Amdaporians were tasked with restoring what Black Magic destroyed. For many years, this balance persisted, but as Black Mages sought greater and more powerful spells, White Mages stretched the limits of their power and the War of the Magi broke loose, bringing irreparable harm to the planet and the Twelveswood. Furious, the Elementals summoned a great flood which washed the taint of the Magi from the planet and grew the Twelveswood up and around the lost city of Amdapor so that its magic would never be recovered. For 1000 years White Magic was lost to the world, until the Elementals birthed the Padjal race from the Gelmorrans and filled them with the blessing of Succor. These Padjal protected and restored the Wood with their power and lead the new Gridanians into an age of peace with the Wood.
Conjury is the youngest form of magic, born only 500 years ago during the time of Gelmorra. After the 5th Umbral Era had ended and the survivors made their way back to the Twelveswood, they found their way blocked by thick trees and angered Elementals. So the Elezen dug beneath the forest and lived in caves for a 1000 years, trying to make peace with the Elementals above and live within the Wood once more as they did in the time of Amdapor. Now, during this time, Hyur began flocking to Eorzea in great migratory waves, causing wars between the Hyur and Elezen races all across Eorzea. However, when the Hyur attempted to enter the Twelveswood, the Elementals forbade them egress as well. Looking past their racial differences, the Elezen of Gelmorra welcomed the Hyur with open arms. It is believed this act of goodwill and fellowship is what compelled the Elementals to reconsider their stance. The Elementals sent Moogles to communicate with the leaders of Gelmorra and teach them a way to communicate with the Elementals. The magic the Moogles taught the Gelmorrans became known as Conjury, the ability to manipulate the aether in nature using concentration and meditation. This magic birthed the first Hearers, men who could hear the will of the Elementals.
--------------------
So, taking all that, could one person learn to master multiple forms of magic, perhaps yes? But it'd be extremely difficult as each branch of magic is unique in its own way and in the case of some, diametrically opposed to another. In the case of Black Magic and White Magic, they are both forbidden and forgotten magicks that were created in opposition of one another.
As far as any of the ancient magicks go, they are all but lost to the world for many centuries. Learning one is probably fine, but learning multiple relies on the absolute crazy happenstance of finding out about the magic in the first place and finding someone to teach it.
If you want to do that, I tried to break down who would feasibly know about each of the ancient magicks:
Black Magic: Prelates and High Priests in the Order of Nald'thal would know about Black Magic but most would not be able to teach it. There are also some Beast Tribes which still practice Black Magic to some extent. If your character is friendly with beastmen, perhaps that could be used as an in for Black Magic.
White Magic: The Padjal are the only living users of this magic. You would have to learn from them and earn their trust. Elementals can also bestow the magic, but will only do so if you are judged pure and incorruptible of heart. The recent Lore Panel also suggested that there are others who may be trying to reclaim the lost Succor of Amdapor through nefarious means. This likely has something to do with the Lambs of Dalamud and the upcoming Amdapor Keep HM dungeon.
Summoning: The Sons of Saint Coinach know about the magic, but none of them really know how it works or how to teach it. The Ascians can and will teach Summoning, if you want your character to be involved with the Asicans.
Scholar: Military tacticians and scholars would probably know about the Scholars of ancient Nym, but a large part of a Scholar's magic is drawn from their Fae companion, so you'd have to find one of those as well.
Hope this helps! ^^;
Part 2:
Focusing in more on your specific character, I believe the backstory is believable with the exception of him already knowing White Magic. And I'm not saying this because "White Mage taboo GTFO" but because you said your character's family is wealthy and Ul'dahn. So I think that particular point needs more fleshing out? Did your character grow up in Ul'dah and get sent to Gridania to learn Conjury... somehow become a White Mage in the process, and then up and leave to return to Ul'dah?
I'll begin with anyone can RP however they wish to... however, from a purely lore standpoint, it would be highly unlikely to become a master of all schools of magic. Also something to note, conjury is not the same thing as white magic. Thaumaturgy is not the same as black magic. The methodology of Arcanima is closely related to Scholar and Summoner, but also note that these are also three different magicks from three different time periods. So when you say you want to master all schools of magic, be aware that there aren't just three... there are closer to seven. Eight if you count the coming Astrologian, which we don't know much about yet.
Summoning was a magic practiced and perfected by the ancient Allagans 5000 years ago. It was likely the forefather of modern day Arcanima. Summoners would draw upon the absorbed spirit of defeated Primals of eld and conjure an essence or Egi of that Primal which had been bent to the caster's will.
Scholar, unlike its Summoning and Arcanima relatives is actually less a summoning art. Scholars created strong bonds with an Elemental-like creature called a Fairy or Fae. Also unlike Summoners and Arcanists, the Scholars of Nym focused on restorative magics and drew upon their own skills and the magicks of their Fae to cure their allies. However, after the plague befell Nym, the Scholars lost their ability to communicate with their Fae and evoke their magicks and Scholar was lost for the next 1600 years.
Arcanima is likely descendant from bits of Summoning and Scholarly magic. Like their predecessors, Arcanists draw and channel their magic through geometric shapes and patterns aided by specialized inks which amplify their energies. Using their own aether, Arcanists can call forth a Familiar called Carbuncle to aid them, likely left over from Summoning days.
Thaumaturgy is believed to be the original form of magic of the 5th Astral Era, close to 3000 years ago. Thaumaturgy draws from the caster's own aether and focuses the spell through a gemstone medium to cast. Over the centuries, Thaumaturgy took a dark turn and became a magic focused upon death. Skilled wielders of the magic were able to do incredible things, such as return people from Thal's realm. When Ul'dah and Sil'dih rose from the ashes of Belah'dia, Thaumaturgy took on the duality of the Traders, Nald'thal, and became the study of life and death. The religious Order of Nald'thal was formed with the belief that by using Thaumaturgy to more deeply understand Death, they might better be able to understand and appreciate Life.
Black Magic, by contrast, is actually a technique, not a true form of Magic. In the early years of the 5th Astral Era, a young Magi named Shatotto wished to further the limitations of Thaumaturgy, but was ultimately unable to perform the magicks she wished to due to her own limited aether supply. So she devised a method to curb the Lifestream and draw upon the aether of the planet instead of her own. This technique was coined "Black Magic" as it killed the land around the caster, but it afforded Shatotto unlimited power and paved the way for the War of the Magi centuries later. By the time the War of the Magi broke out at the end of the 5th Astral Era, Black Magic was capable of many incredible feats - bringing down stars, animating inanimate objects, and tearing holes in our Physical Plane, opening a portal to the Void and drawing forth unimaginable demons upon the world. However, by the end of the War, Black Mages had drained the world entirely of its aether and had nearly killed the planet. Because of this unlimited destructive force, Black Magic was forbidden and strictly outlawed.
White Magic or Succor is the magic of the Elementals. Around the middle of the 5th Astral Era, it was gifted to the Amdaporians to balance the destructive power wrought by Shatotto's Black Magic. These Amdaporians were tasked with restoring what Black Magic destroyed. For many years, this balance persisted, but as Black Mages sought greater and more powerful spells, White Mages stretched the limits of their power and the War of the Magi broke loose, bringing irreparable harm to the planet and the Twelveswood. Furious, the Elementals summoned a great flood which washed the taint of the Magi from the planet and grew the Twelveswood up and around the lost city of Amdapor so that its magic would never be recovered. For 1000 years White Magic was lost to the world, until the Elementals birthed the Padjal race from the Gelmorrans and filled them with the blessing of Succor. These Padjal protected and restored the Wood with their power and lead the new Gridanians into an age of peace with the Wood.
Conjury is the youngest form of magic, born only 500 years ago during the time of Gelmorra. After the 5th Umbral Era had ended and the survivors made their way back to the Twelveswood, they found their way blocked by thick trees and angered Elementals. So the Elezen dug beneath the forest and lived in caves for a 1000 years, trying to make peace with the Elementals above and live within the Wood once more as they did in the time of Amdapor. Now, during this time, Hyur began flocking to Eorzea in great migratory waves, causing wars between the Hyur and Elezen races all across Eorzea. However, when the Hyur attempted to enter the Twelveswood, the Elementals forbade them egress as well. Looking past their racial differences, the Elezen of Gelmorra welcomed the Hyur with open arms. It is believed this act of goodwill and fellowship is what compelled the Elementals to reconsider their stance. The Elementals sent Moogles to communicate with the leaders of Gelmorra and teach them a way to communicate with the Elementals. The magic the Moogles taught the Gelmorrans became known as Conjury, the ability to manipulate the aether in nature using concentration and meditation. This magic birthed the first Hearers, men who could hear the will of the Elementals.
--------------------
So, taking all that, could one person learn to master multiple forms of magic, perhaps yes? But it'd be extremely difficult as each branch of magic is unique in its own way and in the case of some, diametrically opposed to another. In the case of Black Magic and White Magic, they are both forbidden and forgotten magicks that were created in opposition of one another.
As far as any of the ancient magicks go, they are all but lost to the world for many centuries. Learning one is probably fine, but learning multiple relies on the absolute crazy happenstance of finding out about the magic in the first place and finding someone to teach it.
If you want to do that, I tried to break down who would feasibly know about each of the ancient magicks:
Black Magic: Prelates and High Priests in the Order of Nald'thal would know about Black Magic but most would not be able to teach it. There are also some Beast Tribes which still practice Black Magic to some extent. If your character is friendly with beastmen, perhaps that could be used as an in for Black Magic.
White Magic: The Padjal are the only living users of this magic. You would have to learn from them and earn their trust. Elementals can also bestow the magic, but will only do so if you are judged pure and incorruptible of heart. The recent Lore Panel also suggested that there are others who may be trying to reclaim the lost Succor of Amdapor through nefarious means. This likely has something to do with the Lambs of Dalamud and the upcoming Amdapor Keep HM dungeon.
Summoning: The Sons of Saint Coinach know about the magic, but none of them really know how it works or how to teach it. The Ascians can and will teach Summoning, if you want your character to be involved with the Asicans.
Scholar: Military tacticians and scholars would probably know about the Scholars of ancient Nym, but a large part of a Scholar's magic is drawn from their Fae companion, so you'd have to find one of those as well.
Hope this helps! ^^;
Part 2:
Focusing in more on your specific character, I believe the backstory is believable with the exception of him already knowing White Magic. And I'm not saying this because "White Mage taboo GTFO" but because you said your character's family is wealthy and Ul'dahn. So I think that particular point needs more fleshing out? Did your character grow up in Ul'dah and get sent to Gridania to learn Conjury... somehow become a White Mage in the process, and then up and leave to return to Ul'dah?
