Another idea I want try.
There's a world were magical creatures live as themselves, this is the home of the unicorns.
Once a while, when two unicorns go at it, they birth non magical horses. Sadly, they can't really help because most of the work is down through magic. But that fact doesn't deter them from being sorcerers, scholars or other professions.
They're on the other professions. And request their Unicorn buddies to travel to other worlds to offer their services, for a price.
That's kind of the world building for them at this point, so I might do something with them later.
You guys can tell me about your thoughts if you like. U#U