Their ancestors were. Like we were. The thing we were brought to fight was defeated last year, but now no one can shut down the spell, so people like you keep showing up.

Maybe that was what changed the spell. Whatever made it self-sustaining modified it so that the kedan were freed of its effects. Or maybe the effect was a result of the thing we defeated. Or the change in the turtle...

... someone told you the city is on a giant turtle, right?