The Duchy of Sapphire had quite a few volcanoes, with large islands like Blue Dragon Island and Iron Hoof Island dotted with active ones. Even Coral Island had a volcano, albeit an extinct one, situated between Birch City and North Valley City. Liszt had even explored there.
He even conjectured that Black Horse Island was an extinct volcano.
"Should the Little Fire Dragon be raised inside a volcano?" he frowned in contemplation. It made logical sense for a young Fire Dragon to hide within a volcano.
It was even possible that juvenile Fire Dragons didn't need to eat at all and could simply bathe in magma—a magical creature formed by magic power, it was hard to imagine in what way it needed to survive.