Talk:Hearthbreakers/@comment-26313058-20151025231421/@comment-1023843-20151216041106

That's a fairly plausible theory. After all, Spike didn't hatch until Twilight hatched him with magic, so for all we know, dragons may need magic to hatch. Holder's Boulder may be an egg that never hatched and eventually petrified or may be an unfertilized egg that eventually petrified. Then again, it could've been just an egg-shaped rock that a dragon either brought back to it's nest for some reason or mistook for an egg.