Gyokuji means the qualification of a king, and it is said that with this you can create an invincible army. After all, it is said that the three dragons nesting on this continent can follow. That said, it is limited to wild dragons, not domesticated dragons, but there are more dragons than tamed in the nest of three dragons in the Northern Mountains.
Moreover, compared to all the dragons that were kept as pets, most of them in the wild were adults. It seems that every royal palace breeds adult guardian dragons from each country, but the numbers are small.
It was said that even a single dragon cub could rival several skilled adventurers, so if it was attacked by a group of adults, even the strongest defense would be crushed. It is the strongest army.
However, in Roy's memory, the Great Seal had not been found for more than 300 years. As a result, a seemingly peaceful state continued on this continent.