On Friday morning, Snape barely managed to teach two consecutive potion - making studies classes.
Due to the large time gap, the students whose memories had been erased didn't realize anything was wrong.
Naturally, they also didn't know that Dudley had stolen a part of their class time.
After class, on the way to the Great Hall for lunch, Hermione was in a very low mood. Because of her guilt over the previous interception, she didn't perform well in the subsequent potion - making class and made some mistakes in the process of brewing potions.
Neville's situation was not much different. Affected by the side - effects of numerous Memory Charms, his emotions were much duller than Hermione's. His sense of guilt was not as strong as Hermione's, but due to his dullness, he encountered one problem after another when making potions.
Although Snape didn't scold Hermione and Neville too much in class because of Dudley, the guilt and frustration of doing something wrong and making the wrong potion still haunted Hermione and Neville.
Dudley didn't pay much attention to Hermione and Neville. During lunch, he only assigned tasks to Harry and Ron.
He asked Harry to use the free time in the afternoon to have afternoon tea with Hagrid and convey to Hagrid the task of going out to buy Quidditch supplies.
He also preliminarily planned a simple study plan for Ron, asking him to go to the library to study on his own in his spare time.
Then, he ran to the Interrogation Room constructed by the Room of Requirement alone and used Peter Pettigrew, who was covered in rats and insects, as a target to practice Killing spell again.
When Peter Pettigrew was on the verge of collapse again due to the injury, Dudley turned to practicing alchemy and wand - making.
This included continuing to make new special wands for fighting enemies by combining Harry's hair with different kinds of new woods, as well as modifying and strengthening Diggory's old wand.
Dudley was working in an orderly manner, and all his tasks were in full swing.
Eris was no less efficient.
This seemingly frail but scheming professor troubled Madam Pomfrey early in the morning to take her to the Herbology greenhouse behind the Castle to ask Professor Sprout for various potion materials.
The reason she gave was exactly what she had thought of in advance.
Like Professor McGonagall, Madam Pomfrey and Professor Sprout firmly believed in Eris's lovestruck persona and were very generous and helpful.
So, Eris got all the materials she wanted without any trouble.
After being brought back to the school infirmary by Madam Pomfrey, she borrowed a special potion - making room in the school infirmary, locked the door and closed the windows, and dismissed everyone with the excuse of "not being disturbed during potion - making".
She began to concentrate on brewing her special potion.
This whole action was live - streamed to Dumbledore in the headmaster's office through the invisible special tracking camera made by Peeves.
Dumbledore thought Eris could come up with some brilliant tricks to trigger some unexpected changes and was even ready to interfere. However, he saw that Eris used that kind of potion as a base to disguise unicorn blood, and he immediately gave up the idea of interfering.
Eris had no idea that her actions were being filmed the whole time, let alone Dumbledore's thoughts.
After successfully concocting the desired potion, she was in high spirits, believing that her "fake blood, real potion plan" was most likely to succeed.
So she brewed several more regular healing potions and tonics as a cover for others' inquiries, and then prepared to leave the potion - making room.
She planned to return to her own office at night to summon Voldemort's main soul and implement the plan.
Little did she know that Voldemort couldn't wait any longer.
It was a little after two o'clock in the afternoon. Before Eris left the potion - making room in the school infirmary, the wand in the pocket of her hospital gown suddenly began to vibrate inexplicably.
She was startled and knew that Voldemort's main soul was calling her. Without daring to delay, she quickly calmed her mind, took out her wand, and communicated with Voldemort's main soul from afar.
This method of communicating by controlling the vibration of the wand couldn't convey overly complex information.
Voldemort's main soul had only set up a few question - answer situations with Eris.
By feeling the rhythm of the wand's vibration, she quickly understood that Voldemort's main soul was asking her if the task was completed.
Eris immediately took several deep breaths to calm herself down. She infused her magic power into her wand and gave a remote response to Voldemort's main soul.
Of course, she replied that the task was completed.
Upon receiving the message, Voldemort's main soul was extremely excited and sent another message, asking Eris to find a safe place to summon him.
Eris hesitated for a while but finally steeled herself and took a leap of faith.
Holding her wand, she pointed it at an empty space in the potion - making room and recited the incantation: "Snake Summons!"
The invisible magic power first spread from the tip of the wand to sense the surrounding situation. After confirming it was safe, the Brazilian python parasitized by Voldemort's main soul was teleported over in a spiral.
The whole process was extremely fast. From an onlooker's perspective, as soon as Eris finished reciting the incantation, a deformed big python emerged from the tip of the wand.
The moment the python appeared, the invisible Peeves floating in mid - air in the potion - making room and Dumbledore, who was observing through Peeves' eyes, were both startled and on high alert.
"Gimme… Quick, bring me the unicorn blood! I want to drink it!"
Voldemort's main soul, through the deformed face growing behind the python's head, impatiently urged.
He didn't even notice the invisible spirit floating in the room.
"Yes, Master!"
Eris replied meekly. Then, pretending to be seriously ill but doing her best, she took a large long - necked flask from a pile of vials and jars on the potion - making table and held it in front of Voldemort's main soul's strange eyes.
This large glass container was filled with a silver - blue viscous liquid that looked exactly like unicorn blood.
"Is this the unicorn blood?"
Voldemort's main soul wriggled the python's body. His strange blood - red eyes under the snake scales first carefully examined the bottle of liquid, then looked at Eris with a pale and sickly face.
He had been extremely eager just now, but now he wasn't in a hurry to drink it.
Eris' heart skipped a beat. She used Occlumency to the fullest and said plaintively yet firmly:
"Yes, Master!"
This is unicorn blood. I personally killed a unicorn and obtained it from its body! To get this bottle of blood, I sneaked into The Forbidden Forest at night. I got seriously injured and almost lost my life!
"Hiss... Hahaha... Don't be so tense, my good servant! I'm just asking."
After hearing Eris's explanation, Voldemort's main soul let out an unpleasant, strange laugh.
Then, with the strange mouth that split open under its snake scales, Voldemort's main soul directly bit the mouth of the long - necked flask Eris was holding, clamped it tightly, and then tilted it upwards.
"Gulp, gulp, gulp..."
In less than ten seconds, a whole large bottle of the specially - made 'unicorn blood' was poured into the belly of Voldemort's main soul (in the form of a Brazilian python).