Oh God, the Ivory Horn broke me when I first read it. I'm a lot more critical of Narnia than Amand-r's fic is, and hold an undying grudge about Susan, so I could see a creepier, darker crossover. I loved Narnia as a kid, until the Last Battle, and I love reading fic that goes deeper with Narnia.

And really, all I can say is wriiiiite iiiitt when it comes to Highlander/Narnia fic. Bonus points if Susan meets Methos.