User blog comment:B214/Chapter 510: Natsu's Heart/@comment-97.104.204.83-20161114104048

What if the dragon that killed Natsu and his parents was the blue skull dragon in Fairy Tail Zero? Since the blue skull dragon was a fire dragon and in the anime the blue skull dragon used blue fire.

http://mangastream.com/r/fairy_tail_zero/005/2606/23

http://mangastream.com/r/fairy_tail/510/3803/13