Okay so, a quick note on Slayer types, in case anyone is thinking them up: The processes of becoming a slayer and what that means for the mage utilizing for the magic is going to be a bit different for each type of Slayer.


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Dragon Slayers(Of the first generation) are transformed by the process of learning the magic, needing to consume the blood of the dragon teaching them in order to fully take on their traits. The exact nature of the transformation is similar to that of Witcher transmutation, albeit much, much less fatal. Still not pleasant as experiences go, but you'll likely survive the process with no outward differences. . . at first. This leads to the usual Slayer traits of enhanced senses, ability to consume magic, etc, etc. This does have the adverse effect, however, of making one take on the mental aspects of a dragon as well as the physical. Dragon Slayers are known to be confrontational, Aggressive, and possessive. Not only that, but many tend to overestimate their strength and think they can take on any and all threats that they encounter. The worse-off tend to even go looking for fights, and there are a few tales of dragon slayers going off into the Valley of Ancients. . . only to never return. This is an aspect that can be handled and somewhat suppressed through discipline and constant self-restraint, but it's something that Dragon Slayers must constantly be aware of.

God Slayers, however, must learn their magic through a form of ritual, of which the exact nature varies from Slayer to Slayer, but the one commonality is that in order to learn the style, one must "make themselves a vessel for the sins of Man." What this means is, ultimately, you must portion of a portion of your soul to be inverted and through this inversion, gain the ability to pull Gods and Spirits into the realms of mortality and thus render them vulnerable to the magic and weapons of men. God Slayer magic is also seen as dark magic, due to the fact that those who make use of it are often seen as giving up their humanity, tending to embrace their worst character attributes whenever they make use of the magic. 

Devil Slayers, on the other hand, are basically people who have cursed themselves in mind, body, and soul. By taking in the demonic taint of Curses, they gain resistance to their influence and are able to even gain strength from it. However, the presence of a Devil Slayer is not welcomed by nature. They constantly exude an aura relating to the demonic curse they took upon themselves to initiate their transformation into a Devil Slayer, and often times, using their magic will negatively affect the environment.
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