Enter: the zeroth generation dragon slayer.
- basic review of actual dragon slayer generations:
1st gen: these slayers were taught by a dragon. They are the original dragon slayers.
2nd gen: these slayers gained their magic by having a magical lacrima put inside their body.
3rd gen: were taught by a dragon and then had a magical lacrima put inside their body for additional power
Now the zeroth generation is quite simple: half breeds.
Basically big scary and scaly got freaky with a human and badabing bada boom a half human half dragon hybrid appeared. These resulted in a zero generation dragon slayer whom I named Jabberwocky, the crazy dragon.
Jabberwocky has everything the other dragon slayers have only amplified even greater than what the third gen has in power, including the defensive prowess near that of an actual dragon. Additionally he can turn into a dragon and gain all the powers of a dragon.
Jabberwocky's ultimate goal is global domination with intent on gaining more and more power by killing dragons and dragon slayers and stealing their power by eating them. His rashness and short temper coupled by this are what give him the nickname "crazy dragon".
notice: do not give access to this form of dragon slayer as it is as unreasonably powerful as I wrote it and as it should be.