Light Dragon Slayer Magic (QOS)

White Dragon Slayer Magic (白の滅竜魔法, Haku no Metsuryū Mahō) is a Caster Magic, Lost Magic, and Dragon Slayer Magic that allows its users to generate, manipulate, and consume light to potentially slay dragons.

Overview
As the name suggests, White Dragon Slayer magic gives its users what can be seen as dominance over the element of light. This strength allows them to generate, manipulate and consume light in a way similar to that of an actual White Dragon, thus harnessing a dragon's own strength inside of a human body. To gain this form of magic, one must first gain a hybrid physiology, mimicking that of their draconic counterpart, giving them the necessary component to use their strength. There are five known ways to gain Dragon Slayer Magic, each referred to as a generation. A First Generation Dragon Slayer (一代滅竜, Ichidai Metsuryū) is one who was personally taught by one of these mighty beasts who implants their strength within their trainee through physical training. A Second Generation Dragon Slayer (二代滅竜, Nidai Metsuryū) is one who has had a dragon's power integrated directly into their body by a Dragon Lacrima. A Third Generation Dragon Slayer (三代滅竜, Sandai Metsuryū) is one who has learnt in two styles, whether it be a combination of First and Second, Second and Fourth or Fourth and First is no matter. These slayers occasionally find that their element in the raw is a Dual Element Dragon Slayer Magic. A Fourth Generation Dragon Slayer (四代滅竜, Shidai Metsuryū) is one who has learnt through a Dragon's Scroll  (龍の巻物, Ryū no Makimono), an ancient writing containing the essence of a dragon's strength. Lastly, a Fifth Generation Dragon Slayer (五代滅竜, Godai Metsuryū) is one who holds a Magical Item, crafted with a Dragon Lacrima laid within. This generation is different from its others since the strength of a dragon can only be used through the item itself. Nonetheless, these generations lead a Dragon Slayer to the same results; the ability to harness a dragon's strength through a variety of light-based methods.

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It seems that beyond the regular, offensive, defensive and supplementary spells, Dragon Slayers have access to what is referred to as Dragon Slayer's Secret Arts (滅竜奥義, Metsuryū Ōgi), the most powerful spells achieved by a White Dragon Slayer, surpassed only by their Ultimate Art (滅竜極義, Metsuryū Gokugi). To unlock these spells, a dragon slayer must go through intense training to be able to handle the stress these incredible spells put on their body. Because of this, these spells should only be used as a last resort, with caster's own life at stake. Additionally, some Dragon Slayers have shown the ability to enact a mode, either that drastically enhances their element past what it normally is, or what is referred to as a Dual Element Dragon Mode (モード二要素竜, Mōdo Niyōsryū), combining their element with another to create an entire new extension of their capabilities for a brief period of time. Overall, White Dragon Slayer Magic is incredibly powerful and versatile, with a variety of different ways to use this magic to its fullest potential. The light possessed by each slayer is completely unique to each user, giving them their own element to manipulate in any way they see fit.

Changed Physiology & Abilities
Draconic Physiology:

Incredible Light-Based Resistance:

Shining Flame Mode
Shining Flame Mode (, Shainingu Fureemu Mōdo lit. Dragon Slayer Magic Modification — Shining Flame)...

Dragon Force
Dragon Force (, Doragon Fōsu lit. True Strength of the Dragon)...

Trivia

 * This article, including the author's version of generations, secret arts, modes and powerups, was approved by Per.
 * Permission to use and adapt the concept of Ultimate Art into the author's own interpretation was given by  Damon .
 * This is the author's personal take on the popular light variant of Dragon Slayer Magic, if you would like to use it, you may ask.