Someone can have this idea

Yn was a pawn of sona sitri the peerage ignored him for saji he had a crush on tsubaki and sona but the like saji until Yn couldn't take it any more Yn told of to sona and told her that she was the worst master of all time and Yn took out his pawn piece and before he left Yn told her that he hope that soba ends up died and then he left Yn trained to get his vengeance against sona and her peerage till he meet a dragon and he wanted to teach him dragon slayer magic it was called

Blaze slaying magic

1 dragon blaze roar

2 dragon blaze claw fury

3 dragon blaze overheat

4 dragon blaze solar blast

5 dragon blaze fear flame

6 dragon blaze hurricane

7 dragon blaze heart burn

8 dragon blaze flame body

9 dragon blaze fire illusion

10 dragon blaze flame burst

Dragon slayer secret arts dragon blaze Dark flame death force

Ship

Yn x juvia