After spotting the new white dome from one of the castle windows, it hadn't been long until Sam had decided to investigate. She'd briefly wondered if the Groundskeeper had erected a miniature Millennium Dome, but that didn't really seem to be his thing. So, of course, she'd enrolled her bestie's help to investigate.

"I heard someone say it's an igloo," she said, pulling the Gryffindor down the path. "But that can't be right, can it? It's not that cold here. Not yet."