I’m confused about world types
World building question
I have researched world types, but am a bit confused as to if my world is a secondary world, hidden world, or if it’s automatically a portal world. Aetheria is a magic realm that is attached to Earth. It was created my ancient witches to escape death and persecution. Aetheria’s technology and architecture have evolved alongside Earth’s because they have sent “hunters” back to earth through portals to find witches and track magic signatures. These missions occur often, with multiple teams switching out. I’m not sure if because there is a portal, it’s automatically a portal world.