Dragon Slayer:Dragon Slayer Magic is a form of slayer magic which is (as the name suggests) taught by dragons and is used to slay dragons. The user can also utilize an element in battle such as fire, ice, steel and air etc. Dual-Element Mode is only born when a Dragon Slayer has a bond with another Dragon Slayer giving them more power. No Dragon Slayer should have any type of black flame, lightning,ice or anything as this is only for God Slayers.
Breath attack for Dragon Slayer is called RoarDragon Force: activates when a Dragon Slayer starts to turn their own body into a humanoid dragon. Dragon Force increases the user's power tremendously. According to Zero, it is the most powerful and final state a Dragon Slayer can attain. It increases the damage from standard Dragon Slayer attacks and causes their body to cover in scales and their Magic aura to become visible, taking the shape of a dragon. For Old-Style Dragon Slayers, certain conditions must be met in order to achieve Dragon Force state; the only one known so far would be to eat substances with powerful Magical properties, preferably those related somehow to the element they can control and consume. Natsu Dragneel (through consumption of Etherion and from the Flame of Rebuke), is the only one of the three known True Dragon Slayers to activate this power. It is likely, given the description as the final state a dragon slayer can attain, that a dragon slayer may eventually gain access to it without outside sources of power.
Phoenix Slayer:Phoenix Slayer Magic is a form of Slayer Magic which is taught by phoenixes to slay their own kind. The user can utilize an element in battle. It is regarded as slightly weaker in terms of raw power to God ,Dragon, Demon or Devil. however, the user's wounds regenerate slowly over time, and the user does not need to consume an element to regain stamina, instead absorbing it the moment it is touched more than make up for this setback. Phoenix slayers are able to detect other Phoenix slayers.
Breath attack for Phoenix Slayer is called ScreamPhoenix Froce:When a Phoenix Slayer enter The Phoenix Force they gain feather like markings on their face, talon like nails on their fingers and toes. They also gain a unique spell that allows them to fly by taking the form of the phoenix in question be it Storm, Magma or Light. Also should the user be killed while in Phoenix Force mode they'll come back to life but will be in a rage for a couple of minutes.
God Slayer:God Slayer Magic is a form of Slayer Magic which is taught by "gods" but can also be taught by another mage who knows this magic or learned from a book. It is used to slay "gods" like Dragon Slayer is used to slay dragons and it also has elemental styles. All God Slayer elements are black such as black fire or black wind. God Slayer is stronger in terms of raw power much stronger than Dragon Slayer magic.
Breath attack for God Slayers is called BellowGod Force:An  upgraded form  where one begins to turn portions of their body into a divine being.
Demon Slayer: Transform the physiology of their body into those of a demon. As a result of this, those with Demon Slayer abilities are able to change their body to their own element, in both offensive and defensive styles. They can also consume external sources of their natural element to replenish their own energy. They are also naturally immune to the effects of their own element that came from both their own body and to those from other sources. Most demon slayers know each other or know of one another thing that makes demon slayers so special. A second generation is able to learn an extra magic from their parent (first generation Demon Slayer parent) A third generation Demon Slayer can learn two different types of magic along with their Demon Slayer magic. All Demon Slayers are made from Demon's or the slayer themself. Lacrima is never involved in making a Demon Slayer. Â They are able to find one other from their Demon magic auras, they can also detect other slayers by their magic auras as well or demons.
All Demon Slayer elements come in many colors not just white or black a dark blue or a light color of red and its raw power is believe to be just as strong as God Slayer magic if not stronger.
Breath attack for Demon Slayers is called ClamorDemon Force:Demon Force is the final stage of Demon Slayer Magic, though the exact conditions to invoke it vary from person to person. When Demon Force is achieved, the Demon Slayer's body becomes infuse with their element while gaining some Demon like traits. Strength, speed, and magical abilities are enhanced, improving their combat capability significantly.
Devil Slayer:Devil Slayers are people that utilizeÂ
Devil Slayer Magic. Like Dragon Slayers and God Slayers, Devil Slayers can also become immune to the effects of their respective element and can even eat it to replenish their strength. True to their strength Devil slayers are stronger then all other slayers and are first strongest second being God Slayers. Their magical element is so strong that other element users have a hard time melting it or doing any damage to their element. Having much  resistance to their element they can be harmed by their element at all, they have the most resistance out of all the slayers and can be harmed the least as said before by their element. They can their element type just like other slayers, somewhat control the element of other people, able to freeze,burn or change the landscape with just a flick of their wrist.
Breath attack for Devil Slayers is called RageDevil Force:Changes the physical traits to that of a demon infuse with their element. Their power is increase greatly and is the easiest to master out of all the slayers Force modes.Â
Devil Slayers are different from my Demon Slayers. Just a note