Section I

Harry's learning the Patronus Charm didn't work well, at least in his own opinion, and he was disappointed that he could only conjure up a blurry white mist that barely held off the Dementors, but couldn't repel them - according to Hermione, Dumbledore alone had fought off all the Dementors on the field that day.

Lupin disagreed with Harry continuing to contact the Patronus Charm, believing that Harry's age would be good enough to be at his current level, at least to buy himself time to return to safety when the Dementors attacked, instead of falling out of the air like he had done last time. However, Harry expects more, and in the upcoming match, Tai will not only have to ensure his own safety, but also win without any suspense, and this strong desire makes him eager to learn the Patronus Charm once and for all.

Harry found Sauron during his lunch break, and although Lupin said that the Patronus Charm was a profound spell, he had no doubt that Sauron could help him.

Sauron raised his eyebrows slightly and looked at Harry, and had to admit that Harry's talent was excellent, and as Lupin said, the Patronus Charm was a high-level spell that even many adult wizards couldn't use. Sauron was a bit surprised that Harry was able to train in just a few days, even though he had only mastered the beginner level.

"Come with me, I know a place." Sauron thought for a moment and said, "Isabella, you can come too." ”

Isabella had been listening to the two of them from the beginning, looking curious, and since Sauron had allowed her to go with her, she would naturally not refuse.

Sauron led the two of them all the way to the eighth floor of the castle, stopping in front of the portrait of the "troll stick beating the stupid Barnabas". The students were all having lunch in the auditorium hall, and the hallway was empty with no one else.

"Harry, now you're trying to figure out that you need a place to practice the Patronus Charm." Sauron said.

Harry didn't quite understand what Sauron was up to, but he did so. Soon, under Harry's astonished gaze, the upper door appeared on the wall, and Sauron pushed the door in, followed by Isabella and Harry, and then closed the door.

In the room, as Sauron and Ibikus had practiced in the past, there was a large bookcase on the wall, a row of targets on one side, and a thick cushion in the corner. The only difference is that there is a large cabinet in the middle of the floor.

"What's in there?" Harry asked, "It can't be a Dementor, right?" ”

Sauron shook his head, "Since you practiced with Burgart at Lupin, then there will also be Burgart in this cabinet." ”

He drew his wand, pointed it at the cabinet, and cast a confusion charm on the Boggart in the cabinet, making it think that everyone was most afraid of Dementors, so that it would always appear as a Dementor for the rest of the exercise.

"Are you ready, Harry?" Sauron looked at Harry, "It's about to begin." ”

Harry drew his wand as well, glanced at the cabinet with some nervousness, and nodded at Sauron. Sauron and Isabella stepped aside, and he waved his wand. The door of the cabinet opened, and a Dementor in a tattered black cloak floated out of the cabinet, and for a moment, the air around him suddenly turned cold.

Harry narrowed his eyes at the "Dementors" that were slowly floating towards him, and decisively raised his wand and shouted, "Divine Guard!" ”

Silvery mist poured out of Harry's wand and coalesced into a vague shadow in the air, which stood between Harry and the Dementors, holding Harry firmly behind him.

Harry didn't look well, his face was pale, his legs were trembling slightly, but his eyes were still bright, and it was clear that he was still conscious.

Sauron raised his wand to Boggart and whispered something, and the fake Dementor seemed to let out a scream of pain and jerked back into the darkness of the cabinet, Sauron waved his hand, and the door slammed shut.

Sauron looked at the weakened Harry in surprise, the shadow that had just appeared, although dim and vague, but Sauron was sure that it was the Patronus. Sauron never expected Harry to be able to do this - the Patronus was the most central part of the spell, and it was also the most difficult, requiring not only skill, but also mental cooperation.

"I have to say, you're doing a great job." Sauron said calmly, "Even I couldn't have done better. ”

"But the Patronus is too weak to repel the Dementors." Harry hung his head.

"It's because you're too weak, but that's not the point." Sauron looked at Harry, "You've taken the most important step. ”

Sauron walked to the middle of the room, facing the cabinet, he waved his wand to open the cabinet door, and once again, the fake Dementor appeared.

"Feel it, Harry." Sauron raised his wand, but instead of chanting the incantation, a dazzling white light erupted from the tip of Sauron's wand and shone on the fake Dementor, twisting painfully in the light and dissipating in an instant.

Harry watched dumbfounded, and Isabella was shocked.

"Great, that's what I want to do." Harry said excitedly.

Sauron smiled helplessly, "Actually, that's not a Patronus Charm. He paused, "Not the full Patronus Charm, to be exact. He looked at the two of them, "Do you feel any different from Harry's?" ”

Confused, Harry hesitated for a moment before saying uncertainly, "It seems that your spell doesn't have that shadow." ”

Sauron nodded, "My spell is strong only because my magic is stronger, but I will never be able to have a Patronus. ”

"Why?" Harry was puzzled, and the faint sadness in Sauron's tone worried him.

"Only those who truly have justice and kindness in their hearts are worthy of having a patron saint." Sauron looked at Harry, staring into his eyes, "And I, don't have that qualification. ”

Harry froze, and Isabella stood aside. Sauron's words slammed into Harry's heart, confusing and unsettling him, but more of it was a pain from the heart - for he could feel the pain of Sauron, his own brother; Moreover, he knew that the hatred and sin that Sauron was supposed to be borne by the two of them.

Neither Sauron nor Harry spoke, just looked at each other, and after a long time, Harry smiled, "Anyway, you're my brother." ”

Sauron's heart was touched, and the indescribable touch and relief spread in the bottom of his heart, no matter how strong he was, how cold he was, but in the depths of his heart, that trace of love for his relatives has never been extinguished. He doesn't care about the betrayal and hatred of the whole world, but in the end, he still longs for the understanding and care of the people he cherishes.

Sauron patted Harry on the shoulder, and the two looked at each other and smiled, this is a brother.

…………

Section II

Over the next few days, Sauron and Harry had been making time to practice the Patronus Charm, Harry's next game was just around the corner, and Harry's progress was noticeable. Now, Harry's Patronus had solidified - a silver-white stag, tall and straight, with long antlers perched high above its head, like a crown of kings.

"Guardian of the Gods," Harry shouted, and the silver stag lunged at the fake Dementor, easily knocking it back into the cupboard.

Sauron clapped his hands, genuinely happy for Harry, while Isabella looked at Harry enviously.

Harry scratched his head in embarrassment, but the excitement on his face couldn't be hidden, and now, he finally didn't have to worry about the Dementors.

"Sauron, why is it that my Patronus can only repel Dementors and not destroy them?" On the way back, Harry asked curiously, remembering that Sauron's incomplete spell had completely destroyed the Dementors.

Sauron hesitated for a moment, then said slowly, "I remember I asked you what do you think is the difference between your spell and mine, you only noticed that my spell can't summon a Patronus, now, do you have any other ideas?" ”

Harry frowned and thought for a long time, then shook his head in confusion, but Isabella, who had not spoken, spoke.

"When Harry's Patronus appeared, the glow was warm and pleasant, as if the whole world had become peaceful and peaceful." Isabella said slowly, as if recalling the feeling, "And your spell, that dazzling light, like a flame, burns out mercilessly, that feeling...... It's like ...... It's like a cold trial, exterminating a qiē. ”

Sauron nodded, he looked at the confused Harry, and said calmly, "The power of the Patronus comes from love and pleasure, from the positive emotions in the human heart, these emotions can fight against evil forces and objects, just like the Dementors. Sauron paused, and said sternly: "However, these alone cannot destroy the Dementors, in the final analysis, these positive emotions are just food for the Dementors, no matter how powerful they are, they can only expel them, not destroy them." ”

"But you did." Harry said, "Is there any reason?" ”

"Harry, when you touch the higher powers, you will naturally know, and now even if I tell you, you will not understand." Sauron took a deep breath, "Like Isabella said just now, my power is like fire. Like a spark, when you can ignite the emotions in your heart and elevate your Patronus to a higher level of power, you can destroy the Dementors like I did. ”

Sauron looked at Harry and said earnestly, "When you can do that, you will have mastered the ultimate form of the Patronus Charm, and that is also known as the 'Holy Judgment'. ”

Both Harry and Isabella looked at Sauron in amazement, something they had never heard of. It is not surprising that the Patronus Charm is already a very profound magic, and the "Holy Judgment" of it is almost unknown.

"So, do you know that spell?" Isabella hesitated for a moment and asked in a whisper.

"No, it won't." Sauron shook his head, "I can't even really master the Patronus Charm, so how can I use the 'Holy Judgment' on top of that." In this world, I'm afraid there is only one person who can use that spell. ”

"Who?" Harry and Isabella asked.

Sauron narrowed his eyes and said slowly, "Albus Dumbledore." ”