"Exactly as we analyzed, Lucius Malfoy had indeed been safeguarding one of Voldemort's Horcruxes. He had provided Voldemort with a great deal of funding back then, so Voldemort had placed a certain degree of trust in him.
Lucius's resolve was not particularly firm. When he saw me take the initiative to visit Malfoy Manor, he panicked slightly. With a little verbal guidance from me, he yielded and obediently handed over this rather unusual Horcrux.
Unlike the Voldemort's Soul Fragments within other Horcruxes, the soul fragment inside this Diary Horcrux possessed the complete memories and awareness of Voldemort in his youth.
It even emitted mental fluctuations, drawing wizards into communicating with it by writing in the diary.
It could even construct a mental illusion for conversation, using his young and handsome appearance, his exceptional knowledge of Dark Magic, and his gift for words to break down the defenses of those who communicated with him, ultimately achieving a terrifying effect akin to controlling them with the Imperius Curse.
After obtaining this diary, the 'young Voldemort' inside refused to communicate with me. I used some methods to force a conversation with him and uncovered the secret of this Horcrux.
This should have been the first Horcrux Voldemort created. He had made it before graduating from Hogwarts. This was my oversight."
Dumbledore slowly recounted how he had obtained the Diary Horcrux and what he had discovered from investigating it.
"And this magical chain?" Dudley asked.
"I placed it! This chain seals off all of the 'young Voldemort's' perceptions of the outside world, preventing him from causing trouble.
There are risks in possessing this Horcrux. Lucius kept it locked in a large chest all these years, and now that we have it, we must take proper precautions as well."
Dumbledore answered.
"Then what if I