Channeling Shadow and Thaumaturgy. Possibly Worldwalker for the Nevernever bit. Cloak of Shadows.
Remember that you can have elements not in the Five (Spirit, Air, Earth, Fire, Water) as long as they're similarly restricted thematically. Shadow certainly would be. Darkness, cold, knowing what evil lurks in the hearts of men, that type of stuff would be thematically appropriate for the element.