"Good news and bad news," Strange remarks, still staring at Rita like a goddamn creep. "The good news is that I recognize a thread of this magic. The bad news is that I'm having trouble placing it. Your magic looks oddly dark, like I'm wearing sunglasses."

Strange doesn't really have an explanation for this! He's simply watching Rita with a very confused frown, as if more staring and squinting will somehow help him figure out what the hell's going on and why the hell it's so weird.