Felix politely excused himself and left.

In the afternoon class, he was absent-minded.

"Please turn your books to page 147. Let's look at how ancient shamans viewed the concept of 'being'."

"Professor? That's the part we covered in our last class ...." said a young wizard, raising his hand.

Felix gave a surprised look as he looked at the textbook, "It was indeed my fault and I owe you all an apology. It also shows the point that professors are also human beings who are bound to make mistakes at times ..."

"Okay, let's turn to page 152, today we're going to talk about 'hope' relevant ancient magic rune."

The Weasley twins off the stage looked at each other, and Fred squeezed his eyes: 'It's rare for Professor Hap to make a mistake in class.'

George made lip-sync: 'We witnessed history.'

Fred pinched George's thigh to keep himself from making a sound.

After class, the twins surrounded Felix.

After a few questions were answered, Fred asked curiously, "Professor, is there anything we can do to help you?"

" Pardon?"

"Oh, Professor," George said playfully, "we think you might be in a little pickle, and though we can probably fix it, maybe we can do something about it."

Felix flashed a smile, "Mr. Weasley's, I don't have any ... Well," he looked at the two and asked thoughtfully, "Can you get a magic camera?"

He knew that the young wizards had a private circle similar to a flea market with all sorts of new and interesting gadgets.

"Professor, would a muggle camera and a developing solution work? The effect is the same." Fred said.

"That's right," George explained, "First-year Creevey was the one who asked us to buy the developing solution, but the camera is the one he brought with him."

Felix thought for a moment and said, "Yes."

Within two days, he received the camera, film, and developing solution.

He paid the full amount with enthusiasm.

During the following week, Felix and Helena chatted, they both deliberately did not mention the conflict that night.

Felix described interesting things about the outside world, even including the hidden secrets of his own travels over the years -

"Is it true that you were caught by Auror in the American wizarding black market?" She asked in surprise.

"I can't say that, it was merely a matter of coincidence that I caught one of their operations, and I originally wanted to slip away with the crowd-everyone was masked anyway, and it was easy to get out and Apparite."

"And then what?" She asked with interest.

"Seven Auror found me and chased after me ..." Felix said with a look of regret, "I had to take them down."

That was the first actual battle with his instant killing tactics, except he took a bottle of magic potion in order to enhance the thinking speed, for which he had a headache for a week.

"It's a pity ..."

"Pity about what?" Felix asked.

"Unfortunately I can't use magic, and even lost most of the memories related to casting magic." She said regretfully, "The ghost aren't complete, I only have particularly strong memories concerning my death ..."

"What about other memories?"

"It's either vague or doesn't resonate, like watching a stranger's experience ..." she said.

And At this moment, he finally made up his mind.

Felix said, "Helena, there's something I need to tell you."

"What is it?"

Felix hesitated, and he took out his camera, "Can I take a picture of you?"

Helena looked at him in surprise, she hesitated for a moment in reserve and happily agreed.

Felix took a few solo shots of Helena and then finally a picture of the two of them together.

"It may take a day or two for the developing solution to work." He said.

He looked at the smile that appeared on Helena's face, and his heart fluttered. Helena saw the expression on his face and slowly composed herself, "That's not what you're going to say, right? It is difficult for you to say, Felix?"

"Do you know about the Room of Requirement?"

"Uh, oh ..." she smoothed her hair in some panic, "I know, it's a lab my mother built, I used to go there when I was a kid, but my mother didn't want to be disturbed, but I was always up against her. "

"Have you been there again since? I mean ..." he paused for a moment, "after turning into a ghost."

"No, no." She said dryly.

Felix's heart understood, probably out of guilt, or perhaps self-punishment, she deliberately avoided this place.

He said softly, "I found something in there that Ms. Ravenclaw left behind, probably for you."

"Wh-what did you say!" She flew forward briskly, her eyes fixed on him with a deadly stare, as if to discern, if is it was a bad joke or not.

Felix looked at her calmly in the eyes, not remotely meaning to say anything funny.

Helena believed it.

She asked eagerly, "What is it? What did she leave behind?" Her translucent pearl-white body floated in midair, and her hands tried to grab Felix's shoulders, but they passed through it.

A bone-chilling coldness made Felix shiver.

"It's a memory." He whispered.

...

For the next few days, Helena avoided him.

Felix understood her well, this feeling of being in worry was not pleasant, who could guarantee that the memories of Lady Ravenclaw must be left for Helena?

Can the memories be awakened by the ghost?

When it is awakened, does it retain its reason?

Will there be a reason, and will there be a desired outcome?

Although the answer to these questions is most likely ' yes ', but no one can be sure until the moment when the truth is revealed.

In the meantime, Felix had collected seven photos, and under the effect of the developing solution and the adjustment with his magic, Helena looked like a real person, beautiful, tall, and with a smile on her lips.

Finally, on the morning of the weekend, she found Felix.

"Take me there." She said calmly.

"You've decided?"

She nodded solemnly, accepting whatever the outcome would be.

On the seventh floor, in front of the Room of Requirement, Felix and Helena stood quietly.

A blue door slowly appeared, and Helena looked at him as Felix held the knob and pushed it open.

Felix stepped into the room again, with an additional Helena beside him - or rather, he is the guest.

As Helene stepped into the Room of Requirement, the whole room became active.

Subtle sounds came from all sides of the room, and even without having to switch his perspective, Felix could feel a huge magical force awakening.

The furnishings in the room continued to disappear, and the space continued to stretch until it became a white, borderless world.

Heaven and earth, it seems, have lost their limits, leaving only Felix and Helena two to exist.

Not far in front of Helena, the magic power gathered in a gushing manner, outlining the figure of a lady.

From the illusory, To the reality, she came out of nothingness.

After a thousand years, Rowena Ravenclaw opened her eyes.