Archer (Fate) x Highschool DxD, but Archer becomes a dragon before canon

So, I had the thought recently, if what if I just do what I've already done with Highschool DxD idea-wise, but then make things better by making the main character a dragon. So here we are, I suppose.

I think that it would be really interesting if Archer was a dragon in the world of Highschool DxD. You could make him a dragon king, god, or an evil dragon, as that won't really affect too much of what I'm going to type here.

Rather than Archer having to get used to his newfound dragon powers in modern day, putting up with all of the antics surrounding Rias's peerage and otherwise, I think it would be more interesting if he was reborn into the world as a dragon in the past. Maybe he fights it out with Albion and Draig in the past and gets sealed into a sacred gear like them? Or maybe he's just an ancient dragon by the time of canon DxD, and he encounters people and such.

I think his title should be the the sword dragon, as his main abilities would still revolve around swords. The differences in abilities would come from him having dragon wings/ a dragon body, (but he can transform into human form), and as such having things like fire breathing in his side. Speaking of which, if you can think of a unique spin to put onto the ability of fire breathing, then please use that.