Burying Aragog, the New Acromantula King with an Iridescent Sheen

After Linley and Irina told Dumbledore that Voldemort had made seven Horcruxes, Dumbledore no longer needed Slughorn's memory as urgently as he had before.

After all, the memory was no longer meant to provide intelligence, but merely to corroborate it.

Moreover, Harry had immersed himself in Illusion Trial training. His visibly improving strength gave him immense satisfaction, and he had once put the task of obtaining that memory out of his mind.

It was not until Hagrid's letter arrived that Harry found the opportunity.

"But..." Hermione said calmly, "you know how guarded Professor Slughorn is around you. He sees you as another old fox, just like Professor Dumbledore."

Ron grabbed at his messy hair and said, "Not to mention, Linley's Alchemy Formation has raised the school's defenses by more than one level. Your Invisibility Cloak probably won't get past the Alchemy Formation's detection."

Harry smiled. "Linley knows about the task of obtaining that memory. I just need to tell him what I'm planning, and he'll give me permission to pass through the Alchemy Formation. As for Professor Slughorn..."

Harry took a small bottle from his pocket.

Ron and Hermione's eyes lit up at the sight of it. "Felix Felicis?!"

Harry nodded. "I think it's time to use it. This bottle of Felix Felicis came from Professor Slughorn, and using it on Slughorn is perfectly reasonable, isn't it?"

Before dusk arrived, the three of them headed to the Quidditch pitch once more and entered the Illusion Formation.

They had also signed up for this year's Apparition lessons. At their request, their Illusion Trials these past days had all involved practicing Apparition within the illusion.

The greatest benefit of practicing Apparition in an illusion was that they would not be injured by Splinching. After all, their bodies within the illusion were constructed