They appear in midair, visible out of a few thirtieth-floor apartments.
One starts to fall. The other catches her by the arm, flings out - wing-shapes of light - and slows her, spiraling down until they're at street level.
She doesn't expect anyone to be able to do any magic sensing on their own today but with luck they will all figure out how to tap elementals.
"It's actually a bad idea to try to steer a shadow walk if you don't absolutely have to. Shadows are miles better at it and can bring passengers. We will definitely cover flying - I don't have enough Air to do it without help myself but I have books and we can figure out the rest. And we're going to cover artifacts for sure, what artifacts do you want to make?"