Raven flickers back to blue, catching Elphaba's expression as she turns.

"It's the nanites they injected us with. They apparently dampen whatever this place considers preternatural ability. Give it some time. You won't be anywhere near a hundred percent, but once you've rested and gotten used to their effects, you should still be able to use it."

She sounds relatively blasé about the whole thing, but only because she's had to explain it a dozen times and lives with it every day. But the list of things she'd be willing to do at this point to get these $#%^ing nanites out of her system is pretty goddamn grim.