[Sighs, he's starting to get annoyed from telling this over and over]

Long story short? Dragons are extinct. Four hundred years ago there was a civil war between the dragons over whether or not humans were food or friends. It was a stand still until Pro-human dragons started to train humans to defend themselves verses the ones who wanted to eat them.

Then a dragon slayer went crazy and killed a whole bunch of dragons, becoming one himself, and then became a major asshole who blows up the landscape for fun. There were only six dragons left, probably. Him, my dad, and four other pro-human dragons. The five of them trained me and four others to be dragon slayers before they died. They didn't really tell us why, but it's probably have to do with the one that's left.