Gatekeeper Bella:
Here in Gludio there is an Airship Dock for Airships heading to Gracia.
Gracia is surrounded by a powerful magic force field, so it's impossible to enter it via teleportation or by sea. Only Airships made in Gracia are able to safely travel between the two continents.
A dock made from floating stones was constructed nearby; it took years of work, believe me. Boarding is conducted through the Airship Controller.
The only way to journey to the Gracia Continent is to use this dock. If you wish, I can teleport you there now.