User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-24098614-20150406075649

I would love to know what is so special about that Dragon's egg that Tannin gave to Issei to hatch in the Human world, and I wonder why is the Human world fit to hatch such a rare egg because I know that if a Dragon hatches it would be hard to hide such a large creature such as this.