I want to write a fantasy story where there is no magic spells,etc
but at the same time I want a fantastical world.

Like portals, creatures and possible different races.

I want God of Light and false "gods" characters either serve one or the other.

Can't those portals and other fantastical elements of the world have to be magic? Why can't they just be?

Then I thought of Narnia and the closet door was the portal and yet didn't we all think to be a magic portal?

I'm having a problem as a Christian writer how to use things like that without them being magic.