So, like last time, you can put your caption here as a comment. But better yet is to click on the picture, go to the New Yorker magazine website, and enter your caption in their contest.
Harry, I already looked. There aren’t any spells for “shrinkage.”
It’s a combination of Harry Potter and Seinfeld, so it might mean nothing to you unless you’ve seen enough of both.
Meanwhile, get on with your creative bad self and come up with a caption. You can’t win if you don’t enter.