The Unbreakable Bond

"What... what did you do to me?!"

Severus Snape's voice was dredged from the deepest ice cellar, each syllable laced with bone-chilling cold and barely suppressed rage. His bottomless black eyes, like two man-eating abysses, locked onto Lin Yanqing, churning with the ferocity of an invaded territory and a trace of fear towards the unknown power that even he hadn't noticed.

Lin Yanqing's throat tightened, unable to utter a word. The invisible bond was emitting a continuous, low-frequency hum only he could perceive, like a red-hot brand searing his soul to the gloomy boy before him. This wasn't a connection; it was a shackle, a brutal stitching of fate.

"I..." he struggled to explain, the screams of System Cub in his mind nearly piercing his eardrums.

"Waaaaah!!! ∑(?Д?ノ)ノ It's over, it's over! The contract was forcibly completed! And it's the highest permission [Soul Guardian] mode, indissoluble! Indissoluble! Cub's database has no cases of this kind of trigger! (′;ω;`)"

"What's the point of saying that now!" Lin Yanqing roared internally, while in reality, he could only face Snape's murderous gaze with a pale face.

Their confrontation became the focus of the corridor. James Potter forgot his provocation, adjusted his glasses, and looked at the unexpected interlude with amusement: "Yo, Snape, where did you meet such a... 'pretty' new friend?" He deliberately drew out the words, his malice almost tangible.

Lily Evans's emerald green eyes were filled with worry: "Sev? Are you alright? This student, are you okay?"

Snape ignored everything around him; his world seemed to consist only of Lin Yanqing, the "foreign object" who had forcefully intruded. The soul-deep binding made him feel sick to his stomach. He suddenly raised his hand, his pale fingertips almost touching Lin Yanqing's neck, only to retract at the last second as if afraid of contamination. He spat out an even colder question through gritted teeth: "Speak!"

"I don't know!" Lin Yanqing forced himself to calm down, displaying the appropriate panic and helplessness of an eleven-year-old boy on his face. "I was just passing by... you bumped into me... and then, it felt... strange..." He had to play the role of an innocent; any leak about the system or the contract could lead to utter disaster.

"Strange?" Snape scoffed, his eyes sharp as knives, clearly not believing the clumsy excuse. The moment the contract was established, the dormant magic within him had resonated with it, its source being this seemingly pure and harmless Eastern boy, and the strange deep purple wand in his hand. Was it some kind of evil black magic artifact?

"Wand," Snape extended his hand, his tone an undeniable command, cold as if interrogating a criminal. "Give it to me."

Lin Yanqing's heart sank. A wand was a wizard's other half, and his only support at the moment. He instinctively clutched the Sandalwood Wand tighter behind his back and shook his head: "No..."

This act of resistance was like igniting a powder keg. "So it was you!" Snape roared, his thread of reason snapping. Almost instinctively, he drew his own wand, pointing its tip at Lin Yanqing's chest with astonishing speed!

"Petrificus Totalus!"

A pale, unstable beam shot out! Snape clearly hadn't mastered the spell yet, but the distance was too close, and the malice too strong!

The scent of death washed over him! Lin Yanqing's mind went blank, and survival instinct drove him to push the wand held across his chest forward—no incantation, no technique, just the most primal will to block!

Buzz—!

The Sandalwood Wand emitted a low resonance, and a faint purple shield, like rippling water, instantly spread before him. Light flowed, and obscure runes flashed and vanished.

Puff!

The Petrificus Totalus hit the shield, melting away like ice in a furnace, leaving not even a trace.

Silence.

A deathly silence spread through the corridor.

James Potter's mocking smile froze, Sirius Black's cynical gaze turned serious, and Remus Lupin frowned slightly. A silent defense? A Shield Charm? A first-year?

Lily covered her mouth in surprise.

Snape's pupils contracted, looking at his wand in disbelief, then at the slowly dissipating, yet still lingering, purple halo before Lin Yanqing. What shocked him even more was that the moment the other's wand activated, the soul bond suddenly grew hot, and a weak but homologous power seemed to flow through it, reinforcing the shield. It wasn't that this new student was powerful; it was this damned contract... protecting its "symbiote"?

"Host! Auto-protection triggered! Luckily, the contract shared his magic base! Otherwise, we'd be doomed! (;′??Д??`)" The system cried out fearfully in Lin Yanqing's mind.

Shared magic base? Lin Yanqing's heart trembled. This contract was that overbearing!

"Enough!" The Hufflepuff Prefect finally arrived, sternly stopping the conflict. "The train is about to arrive, everyone back to your compartments to tidy up! Any issues will be handled by the professors!"

The Prefect's authority temporarily defused the powder keg.

Snape retracted his wand, giving Lin Yanqing one last icy glare, a warning that "this matter is far from over." He turned and disappeared into the end of the corridor like a bat blending into the shadows.

James made a face at his retreating back, glanced curiously at Lin Yanqing, and was pulled away by his companion. Lily hesitated, but eventually left.

As the crowd dispersed, Lin Yanqing slid down against the carriage wall, feeling all his strength drained, his back soaked in cold sweat.

"H-Host... are you still alive? (′;ω;`)" System Cub asked timidly.

"Not far from it," Lin Yanqing responded weakly in his mind. "This contract, what's this about sharing magic?"

"According to emergency unlocked data," the system switched to 'Popular Science Mode', "[Soul Guardian Contract] is one of the ancient highest covenants! It binds souls, forming an absolute guardian alliance! Sharing magic, blurring emotional perception, and basic location sensing are just appetizers! It's said there are super powerful hidden abilities waiting to be unlocked! (☆▽☆)"

"Get to the point!"

"The point is, you and Severus Snape are now bound by fate! 'Live and die together' is a bit exaggerated, but 'suffer losses together' is certain! And because it was an involuntary binding, his initial favorability towards you is... -50 (killing intent boiling)! (;′д｀)ゞ"

Lin Yanqing: "..." The future was not just dark; it was an abyss.

"But Host, don't give up!" The system tried to encourage him. "Crisis is an opportunity! Cub will now issue the first mission to turn the tide and reverse this death sentence!"

[Ding! Novice Mission Issued: Icebreaker Words]

[Mission Description: Before arriving at Hogwarts, proactively find your bonded object, Severus Snape, and have at least one three-sentence, non-hostile conversation with him.]

[Mission Reward: Gold Galleons x10, [Beginner Potion Ingredient Pack] x1.]

[Failure Penalty: Experience a random negative status [Uncontrollable Hiccups] for 12 hours. (Believe me, hiccuping during the Sorting Ceremony will definitely become legendary!) ヽ(??▽?)ノ]

A peaceful conversation? With someone who wished he could cast a curse on him? Lin Yanqing felt a wave of powerlessness.

Just then, a strong palpitation struck him! Immediately after, a surging wave of anger, humiliation, and deep helplessness, not his own, like a breached flood, impacted his mind through the soul bond.

It was Snape! His emotions were so intense they felt like they were burning.

At the same time, a clear light spot representing Snape's location flickered stubbornly at the edge of his perception map (the rear of the train).

Shared emotions... location sensing...

Lin Yanqing stood up with a bitter smile, dusting off his robes. He had no retreat. To survive, to not be screwed over by this strange contract and system, he had to face that injured, dangerous young beast.

He gripped the smooth Sandalwood Wand in his hand. It could absorb the opponent's magic to form a shield, and perhaps... it could also be a bridge for communication? He took a deep breath and took a heavy, inevitable step towards the rear of the train, in the direction of the flickering hostile light spot.

The Hogwarts Express rumbled through the night, carrying countless dreams and destinies. And Lin Yanqing's destiny, from this moment on, was tightly bound to the most complex soul, inseparable.