Strange rolls his eyes. He's keeping his hands where they are as he continues the magic. Right, because a Harbinger making the freezer cold would be a perfectly sensible evil plan, use that brain, Rita..

"There's a Harbinger who did something to make someone lock themselves in the freezer. I've no idea how long they've been in there but I know they're still alive and I know I can't maintain this magic forever."

Strange gives Rita a bit of a Look. Well, come on, are you going to help or not?