"How does it feel, Thea?" Dumbledore looked at Cynthia on the hospital bed with concern.

"It's much better, Professor!" Cynthia's face was still slightly pale.

"What more do you need for potions?"

"Unicorn horns and phoenix tears."

"Are these two the only ones?"

"Well, the materials only need the horns of the unicorn, the tears of the phoenix, and the flesh of the heart of the arranger."

"You can rest for two days and then boil it, otherwise it will be too draining."

"It's okay Professor, this potion only takes twenty minutes to make one serving, and if you have four servings, an hour and a half is enough." Cynthia smiled and shook her head.

At Cynthia's insistence, Dumbledore relented and quickly found two other materials for Cynthia.

In the medical wing, Cynthia brewed four bottles of potions unique to the colorless and odorless Heart Guardian Formation.

Seeing that her body was still weak, Dumbledore resolutely objected to Cynthia's request to name and draw the formation today.

After another day in the medical wing, Cynthia regained her former vigor and followed Dumbledore to the Longbottom couple's house.

"Albus!" Frank Longbottom heard the commotion and appeared in the living room with his wand in his hand, and when he saw that it was Dumbledore, he lowered his wand again.

Then he saw Cynthia behind Dumbledore, and immediately raised his wand and pointed at Cynthia, "What's going on, Albus?" She's a Death Eater! ”

"Frank, take it easy! Let me introduce you to Cynthia Black, a member of the Order of the Phoenix, our undercover agent in the Death Eaters. She has revealed these plans to us recently! Dumbledore smiled and introduced Cynthia to Frank Longbottom.

"Well, I'm sorry, Miss Black!" Frank lowered his wand and stepped forward to shake Cynthia's hand.

"What about Alice and Neville? We're here to double insure Neville's safety, and Cynthia will draw a top-level defensive formation on Neville. Dumbledore looked around, but didn't notice Alice and Neville, and turned to ask Frank about it.

"They're on the second floor, Albus, come upstairs with me!" With a warm smile on his face, Frank gestured to the stairs.

Cynthia and Dumbledore followed Frank up to the second floor, Neville asleep, and Alice looking at Neville with her wand in hand.

"Albus, you're here! It's just that she ......" Alice still looked at Dumbledore suspiciously when she saw Cynthia.

"Ellie, this is Cynthia Black, a member of the Order of the Phoenix, our undercover agent inside the Death Eaters, this time to double insure Neville's safety, and Cynthia will draw a top-level defensive formation on Neville. She's absolutely reliable, so rest assured! Dumbledore repeated his previous explanation.

"The top defensive formation? Can that resist the death curse of the mysterious man? Alice hesitated.

"Lady Longbottom, as a Hogwarts graduate, you've probably heard of Heartguard! The next formation I'm going to draw is that. Cynthia opened her mouth and explained calmly.

"You, you mean, the guardian of the heart?!" Frank and Alice both grew their mouths in surprise. "But, wasn't that formation lost because it was too bloody?"

"There is a detailed record in the ancient book of formations that the Dark Lord once gave me, you can rest assured, I have successfully drawn this formation, of course not for the Dark Lord!" Cynthia looked at the surprised expressions of the Longbottom couple and patiently explained.

"However, the method and conditions for drawing that formation need to be ......," Alice looked at Cynthia and then at Dumbledore on the side.

"Don't worry, I'm ready, everything is for the peace of the entire wizarding world." Cynthia smiled and pulled out one of the potions from her bosom. "If there are no other problems, then I'll get started!"

"Let's get started, Thea. Ellie, don't worry, I can trust Thea. Dumbledore looked at Alice, who was still a little hesitant.

"Albus, it's not that I can't trust her, I just think it's too ......" Alice hadn't finished her sentence when she saw Cynthia undo her outer robe, revealing the white shirt underneath, and raised her wand and stabbed it hard.

"Hmm!" As the wand pierced, Cynthia's mouth overflowed with a muffled snort, her frowning brow revealing the pain she had endured.

With Cynthia's movements, a complex and delicate blood-red formation gradually appeared on the sleeping Neville, and finally Cynthia cut through the center of her eyebrows, and a drop of crystal blood rolled down from her eyebrows, and with Cynthia's wand, it fell on Neville's heart.

The entire formation suddenly emitted a strong light, and then disappeared into Neville's body. With trembling hands, Cynthia opened the potion vial and carefully poured it into Neville's mouth.

"It worked, Professor!" Cynthia, pale, turned to look at Dumbledore happily.

"Take a break, Thea. We'll go to Potter's house for a while. Dumbledore looked at Cynthia, nodded, and handed her two potions. This is a blood tonic and palliative that I have prepared in advance, and I think it will help you. ”

"Thank you!" Cynthia took the two potions and quickly drank them.

"Thank you, Miss Black!" Alice walked over, grabbed Cynthia's cold hand, and said gratefully.

"This is my job, Mrs. Longbottom! I just don't want the Dark Lord to succeed. ”

Half an hour later, Cynthia stood up, walked over to Neville, gently touched the boy's soft cheek, and whispered, "Everything will be fine, Merlin bless you!" ”

On their second stop, they came to Grimmauld Place.

"Albus, Thea? How did you get here? Siris looked at the two people in the foyer and asked suspiciously.

"Cialis, take us to Potter's house, something." Dumbledore spoke.

Following Ciris, Cynthia arrives at Potter's house in Godric's Hollow.

"Big Footboard! Albus! You're coming! Jaime rushed over and hugged Siris.

"Cen, Cynthia? What are you here for? Death Eaters are not welcome in our house! After seeing Cynthia at the end, Jaime's tone became cold.

"Alright, Pointed Fork! Thea is also a member of the Order of the Phoenix! Siris slapped his brother's shoulder in dissatisfaction.

"Alright, Siris and Jaime. You two stay here, Thea and I go upstairs to see Lily and Harry!" Dumbledore interrupted the two.

"Alright, Albus. What is this for? The two of them shrugged helplessly.

"The second layer of guard, Thea will draw a defensive formation, let's go up first." Dumbledore explained briefly. "We just did the same thing at Neville, don't worry." With that, he took Cynthia upstairs, leaving Siris and Jaime staring wide-eyed.