Ogregon continent was the place where shifters lived, where they mined magic stones, the only continent that could provide the magic stone for the magic users and healers.
Andelus continent was where the Holy Kingdom was, the place where magic users came from, most of the people there knew how to perform magic and Karam continent was the place where most people there was a merchant.
The three continents had a long history and they relied on each other to keep the economy in each place going.
But Marca El continent was different place entirely. They lived alone and fulfilled their own need. They didn't interact much with the other continent and only recently they were a little bit more open with different culture and explored different places, ever since their new king sat on the throne.