Besides the feeding on memories part? You're guess is as good as mine. Probably better. Maybe just for distraction?

I can do that, although you're pretty out of the way down here. I don't think you should have too much trouble. [There wasn't a lot down in the basement, from what she'd learned, although Tony's quickly turning this place into something interesting.]

Magic seems the prevalent theory I've encountered so far. And everyone's go-to. Maybe because it's so hard to disprove.