High Tower.
Harry stepped out of the Vanishing Cabinet and found the High Tower bustling. Every member was busy.
Will was directing everyone to move things out. Even Malfoy was shifting bookshelves with Michael Corner.
"Huh? What's going on?" Harry asked.
Will kept directing the others as he answered without looking up. "It's time to give this old place more room. Don't you think you can barely turn around without bumping into a bookshelf?
"Especially now that we've had a few new members join us."
Luna was carrying a large box. Will snapped his fingers, and the box rose from her hands. "Luna, don't forget the Levitation Charm."
Neville and Seamus were carrying a box full of herbs. Seeing Will's gesture reminded Seamus that he was a wizard too. He pulled out his wand, but Neville hurried to stop him, afraid he would blow the box apart.
"What are you planning to do?" Sylvia asked as she cast a Levitation Charm on their box.
"Cast an Undetectable Extension Charm on the High Tower, of course." Will told Anco to keep his bookshelves safe.
"An Undetectable Extension Charm?" Hermione stopped with a stack of parchment in her arms, her voice grave. "That's advanced Spatial Magic, strictly regulated by the Ministry of Magic! I read in Research into Forbidden Curses that the Department of Magical Accidents handles several dangerous incidents caused by improper casting every year...
"Private use of this charm isn't permitted, Will."
Will did not answer Hermione.
He was tracing intricate silver paths through the air with his wand. They hung there like a spiderweb, glimmering faintly.
"Stand back, Harry," Will said without turning around, his voice focused. "All of you."
Everyone hurried to the first-floor doorway and watched Will wave his wand.
The silver lines began to spread, rippling