Snape's private warehouse was in the office. If Albert broke into the office directly, Snape would probably be alarmed. Generally speaking, the bedroom of a Hogwarts professor was in the cubicle next to the office. Even if Snape was asleep at the moment, it would still be unwise to break in directly.
Albert's original plan was to lure Snape away by having the Weasley brothers create a disturbance, and then he would break into Snape's office to steal the herbs. However, after taking the Felixir, Albert's first thought was to go to Greenhouse No. 3 and steal a pot of Mandrake.
Why go to Greenhouse No. 3 to steal a pot of Mandrake
Albert himself didn't know, but the intuition brought by the Felicityl told him so, so he decided to go to Greenhouse No. 3 first.
At night, the gates of Hogwarts Castle had already been closed, but this did not stop Albert. He left the castle through the secret passage on the third floor.
The heavy rain outside has stopped, and the air is damp and cold.
Albert tightened his cloak, and before stepping out of the secret passage, he used Transfiguration to create boot covers and put them over his boots to prevent them from stepping on the muddy ground and leaving evidence.
The dock was some distance away from the greenhouse, so Albert quickened his pace and walked towards the greenhouse. Everything went smoothly. He came to the entrance of the greenhouse and used wire to easily open the lock of greenhouse No. 3, which was sealed by the anti-Alaho spell. Before entering the greenhouse, Albert waved his wand to create a ball of light to dispel the darkness in the greenhouse.
The plants cultivated in Greenhouse No. 3 were all dangerous, so Albert was not at all careless. He carefully avoided the dangerous plants in Greenhouse No. 3 and walked to the flower pot rack in the corner.
Albert was very familiar with these things. He had no choice but to change the pot of the mandrake in the morning. He waved his wand again and cast a spell on the flowerpot, making it float up and follow him.
Before leaving, Albert took the brown earmuffs placed in the box next to him.
As for why you need earmuffs
Albert thought that thing might come in handy.
After returning along the same route and entering the secret passage, Albert took off the boot covers from his boots and used the Vanishing Spell to completely destroy the body.
Before walking out of the narrow secret passage, Albert glanced at the time on his pocket watch. There was still some time left before the agreed date.
"I'll keep this thing in the Room of Requirement for the time being, and return it in two days after the mission is completed." When Albert was thinking this, a crazy idea suddenly came to his mind.
Yes, it's crazy.
Albert also clearly felt that he should follow this impulse.
However, he still decided to put this crazy action into action.
So Albert walked towards Snape's office, with the mandrake floating behind him.
Snape's office is underground. Albert has never been there, but it is not difficult to find the location of Snape's office through the Marauder's Map.
A few minutes later, Albert was standing in front of Snape's office.
The entrance was indeed cast with an anti-Arachno-Opening spell, but this still couldn't stop Albert's wire. Perhaps it was due to the Felicity potion, the wire didn't even take a few seconds to open the lock.
The door creaked and was pushed open by Albert. He walked in carefully, his eyes fixed on the door of the private warehouse. Albert did not rush to find the necessary potion materials, but gently closed the door, took out the earmuffs from the pocket of his cloak and put them on himself, and then carefully moved towards Snape's bedroom.
Then... Albert did something surprising. He actually pulled the mandrake out of the pot. The next moment, terrible cries filled the room.
Snape, who was originally sleeping soundly, was suddenly awakened by the crying of Mandrake, and then fainted due to the crying without any preparation.
When Albert stuffed the mandrake into the basin, he looked at Snape who had completely fainted and muttered softly: "This is really exciting. When Snape wakes up tomorrow, he will probably think he had a nightmare."
He took out his wand and waved it gently. The soil that had fallen to the ground flew back and covered the mandrake again.
Before Albert walked out of the room, he walked to Snape's bed and considerately pulled the sheets back up. Then he walked out of the room, came to the private warehouse, and used wire to open the door lock.
Sure enough, the alarm sounded.
Snape cast a protective spell on his private warehouse. If someone broke in without removing the spell, the alarm would be triggered and Snape would know it immediately.
Unfortunately, it was useless to sound the alarm because Snape had fainted and might not wake up until tomorrow morning, so he would have no idea what had just happened.
Albert used the Flying Spell to easily find the Nepean snake eggs, African tree snake skin fragments and the horns of the two-horned beast stored by Snape. As for the dragon claw powder, Albert did not take it. It can be bought in the pharmacy, but the price is very expensive, but it doesn't matter, he has Galleons.
It won't be long before Snape finds out that someone has stolen the herbs, so Albert plans to mislead Snape and make him think that he is preparing to make a compound potion.
Before leaving, Albert glanced at the Marauder's Map. The crying of the Mandrake had indeed caused a commotion, but he still had plenty of time, because from knocking Snape unconscious to opening the private warehouse and taking away the three herbs, it only took less than a minute, and everyone else had no time to react.
After putting the materials in the box, Albert left Snape's office. Before leaving, he locked the door of the private warehouse and the door of the office again.
How do you say it: Quietly I leave, just as quietly I came; with a wave of my sleeves, I take away the eggs of the Nephilim snake, the skin fragments of the African bush snake and the horns of the two-horned beast.
It really is worthy of being called a lucky elixir. The lucky potion really lives up to its name.
Albert was walking in the underground passage, glancing at the Marauder's Map from time to time. Filch had woken up and was about to come over to figure out the source of the sound.
It seems that the two doors still have some sound insulation effect.
The two sides almost passed each other, and there was no way Filch could detect Albert who was under the Disillusionment Curse.
Before anyone else could react, Albert had already reached the eighth floor, put the herbs and the pot of mandrake into the Room of Requirement, and then returned to the Gryffindor common room.
The Fat Lady was not there, but this was good news for Albert.
Soon after, the time agreed by both parties arrived, and Fred opened the entrance to the common room on time and let Albert in.
As for the castle behind him, which was in complete chaos, it had nothing to do with Albert.