Harry and Hermione hurried out to catch up—Lin Xiaoan had already turned a corner.

Somehow he thought of something, Harry pulled out a piece of silver cloth from his pocket: "Hermione, put on the invisibility cloak first, don't be discovered by Xiao An." ”

Hermione didn't understand Harry's intentions, but she was a good girl who was willing to trust her friend: "Good. ”

The two of them followed Lin Xiao'an all the way, and arrived—Harry didn't feel strange at all, but felt a sense of relief—the cellar, Professor Snape's office.

……

Lin Xiaoan stood alone outside the door of the cellar, "looking" at Medusa's head in a daze, his eyes were empty and had no focus.

After a long time, Lin Xiaoan finally whispered the order: "...... Toad crisp. ”

The door opened, Lin Xiao'an's footsteps paused, and slowly walked into the cellar, Harry and Hermione hurriedly followed.

At this time, Professor Snape was grading the students' homework, he heard the movement at the door, looked up and saw Lin Xiaoan, and couldn't help frowning: "It's so late, why are you still wandering around the castle, go back to your dormitory-"

"I have a question in my heart, teacher, I want you to solve my doubts."

“…… What the? ”

……

"Milk – pure milk, let's say someone adds poison to plain milk – even if it's colorless and tasteless, it's usually easy to spot.

To use Muggle common sense, this is because milk is rich in protein and whey, which can form indigestible flocculents when it encounters certain substances.

In addition to being visible to the naked eye and easy to identify, these flocculents can also affect the absorption function of the stomach and intestines, thereby delaying the onset of poison toxicity – right? ”

Professor Snape put down the quill in his hand and listened silently, and when Lin Xiaoan finished speaking, he nodded and said, "You're right. ”

……

"But—"

Lin Xiaoan raised his head not to look at Professor Snape, he blinked vigorously, as if he wanted to force back the tears that were about to flow.

"But!" Lin Xiaoan's voice was choked, and he said, "I accidentally saw the handwriting of a certain Potions master-

He pioneered the invention of a potion that blends perfectly with milk, whether it is appearance, taste or smell, without any change in its properties, even without adding granulated sugar or other flavors to the milk. ”

Professor Snape said grimly, "So what? ”

……

"Tonight...... If it weren't for the accident, that glass of milk would have been what I would have drunk......"

Lin Xiaoan finished the rest of the words in one go.

"Yes, I have a universal antidote. But what I drank was a strong poison that hit immediately, and if I couldn't get the antidote in time, I would detoxify myself...... What are the consequences...... You should know that, right? ”

"So what?" Professor Snape repeated, and he didn't seem to fluctuate in the slightest, and said calmly, "It's all your imagination. Maybe Weasley just got food poisoning—"

"Teacher...... I'm your personal disciple......"

Lin Xiaoan sighed and said, "I've seen that bottle of poison in your medicine cabinet - with a label - only one bottle, because medicine is rare, isn't it?"

I beg you – can you give me a look at the medicine cabinet? If it is really someone I have wronged, I am willing to kowtow to him to make amends! ”

……

Professor Snape's expression was not at all unusual—his face was unsteady, "Ann, your mind is dangerous—you've gone into a misunderstanding—I want you to go back to your dorm and get a good night's sleep, and we'll talk about it again tomorrow." ”

"yes, it's time to bring it up and discuss it - I'll ask Professor Dumbledore in person tomorrow, maybe it's the Order of the Phoenix trying to use my life to gain Voldemort's trust?"

"You're a strange kid, Ann."

Professor Snape finally stopped being indifferent, and he walked from behind his desk and approached Lin Xiao'an.

……

"Kung Fu, great strength, and...... Seems to be immune to spells. I've been thinking about it for a long time, but I can't find the perfect solution......"

Professor Snape lowered his head slightly—Lin Xiao'an was already about his height, only a few inches shorter—and looked Lin Xiao'an in the eye.

"I changed that glass of milk—but you're wrong, it has nothing to do with the Order of the Phoenix.

The great Dark Lord doesn't want you to live, and I must obey his orders—I have followed my master all my life, and joining the Order of the Phoenix is only a stopgap measure.

So, I thought of poisoning - good swimmers drown, good cyclists fall, as long as the poison attacks fast and violently enough, you don't have time to save yourself......

It was a well-developed plan, but it was ruined by the stupid Weasleys! But...... Thankfully it can ......."

……

Lin Xiao'an trembled angrily: "I always thought ...... You are a wizard of justice! Voldemort killed so many innocent—"

Suddenly, Lin Xiaoan couldn't speak, he made a "gurgle, cluck" sound from his throat, and looked down at his left chest-

A sharp silver short knife plunged into his heart!

Professor Snape gripped the hilt of the knife and stabbed the knife deeper: "Ann...... You're careless. I taught you not to trust anyone—you see, that's what disobedience. ”

Lin Xiaoan's eyes were full of disbelief, and he raised his hand with difficulty, trying to do something.

Professor Snape said softly, "Don't rebel senselessly...... The blade of this knife is smeared with poison...... Farewell, Ann. ”

……

"Nope! Xiao An!! ”

Harry shouted, lifting his invisibility cloak.

"Except for your weapons!"

In desperation, Hermione cast the Removal Charm on Professor Snape, but it apparently didn't help.

Professor Snape reacted quickly to dodge the spell, and at the same time his hand let go of the hilt of the knife inserted in Lin Xiaoxin's mouth.

Lin Xiaoan, who had lost his only support, slammed and fell to the ground on his back with his face facing the sky, his eyes wide open, and he stopped breathing without any delay.