Dumbledore was back. Will realized it the moment he saw the Thousand Paper Cranes.
With a thousand thoughts running through his mind, Will unfolded the Thousand Paper Cranes. The message asked him to come to the Office that evening, but said nothing else.
Still, Will planned to give Dumbledore a big gift that day.
After dinner, Will returned to the Room of Requirement first.
One room within the Room of Requirement still held a huge pile of odds and ends—Will had deliberately left them there, because something very important was hidden among them.
Ravenclaw's Diadem.
Ravenclaw's Diadem was the only surviving possession of Rowena Ravenclaw, the founder of Ravenclaw House.
It was said that Rowena Ravenclaw had enchanted it to enhance the wearer's wisdom.
Although Will was very curious whether that was true, Voldemort had turned Ravenclaw's Diadem into a Horcrux, corrupting it.
Naturally, Will had lost interest.
He had kept the Diadem there only to control the timing of certain developments, and now he felt it was time to bring it out.
Who knew what madness had seized Voldemort lately? He had been wreaking havoc throughout the wizarding world, and had even sent Dark Wizards to attack Hogsmeade.
At a time like this, letting Dumbledore teach Voldemort a lesson seemed like a good choice.
With that thought, Will retrieved Ravenclaw's Diadem from the head of a statue amid the clutter.
After wiping off the dust, Will could finally see the Diadem's true appearance.
It was a glittering, jewel-studded crown, with Ravenclaw's famous motto engraved along its lower rim: "Wit beyond measure is man's greatest treasure."
Come to think of it, Voldemort seemed to have a collector's obsession. He had corrupted the possessions of three of Hogwarts' four founders.
Will casually pulled over a sheet of parchment. By the time