Infinity: Kill your way through the movie world.

The group established a highly covert psychic surveillance system through Sarah's mediums, coupled with the high-tech miniature detectors deployed by Jack's team.

Under the integration of internet addiction, the terrifying scenes inside the Tranquil Valley Sanatorium are depicted in three intersecting ways, like a painting of hell, complementing each other and painting a picture.

The scene was clearly displayed on the screen in the temporary command center inside the barn.

As can be seen from the images, the interior of the annex has been transformed into a huge biological laboratory.

It's less like a sanatorium and more like a slaughterhouse filled with stainless steel, glass, and wriggling chunks of meat.

Inside the transparent isolation chamber, various 'experimental subjects' are imprisoned.

Some patients have malignant tumors all over their bodies, yet the tumors pulsate as if they were alive, secreting a viscous, faintly glowing liquid.
Some people's limbs have undergone abnormal changes, with bones twisted and proliferating, covered with a chitinous shell;

Even worse, the body constantly cycles between decay and rapid regeneration, emitting painful, muffled screams.

The Plague Knight, now known as Dr. Green, moved among them wearing an immaculate white coat.

He has a shaved head and looks like a middle-aged villain, but when he is focused, he looks like a fanatical scholar immersed in his own world.

But his eyes were frighteningly calm. When recording data and adjusting instrument parameters, it was as if he were not facing a suffering life, but a series of codes waiting to be optimized.

Sometimes he would hold an old flask inlaid with emeralds in his hand.

That was the source of his power, one of the manifestations of the Plague Ring, guiding the power of filth and life intertwined and injecting it into the experimental subject.

"Damn it." Dean stared at the child on the screen, who had been forcibly transformed into a half-plant, half-animal form and was still twitching slightly. His fists clenched so tightly that his knuckles turned white, and his teeth chattered.

He suddenly stood up and was about to rush out.

Sam, who was standing nearby, also stood up abruptly. The two brothers were similar in temperament, and he couldn't help but chime in as well.

"Dean, Sam!" Bobby grabbed them, his face equally pale, veins throbbing on his forehead, but he held their arms tightly. "We can't go in now, or everything will be for nothing!"

"So we just watch them get tortured like this?!" Dean growled, his eyes bloodshot.

Jack stepped forward and said in a deep voice, "We know this is difficult, Winchester."

"But the chairman's plan concerns the future of all humanity, and the sacrifices here are to prevent a larger-scale, irreversible massacre in the future."

His words were rational to the point of being cold, but they were an undeniable fact.

“What if that’s your child in the picture?” Sam suddenly asked. “He has parents too.”

These words instantly silenced everyone.

Honestly, if it really were their child, could they still endure it like this?

Just when everyone's resolve wavered.

Bobby's gaze was fixed on one of the surveillance screens.

"Wait, this is..." he suddenly said, drawing everyone's attention to the screen.

It was a solitary isolation pod, inside which lay an elderly man with gray hair and a withered face. He was paralyzed from the waist down, lying there quietly, yet his eyes were unusually clear, even carrying an almost devout determination.

He allowed the Plague Knight to inject various ominous reagents into his veins.

"That's... old Marcus?" Dean turned his head, his voice trembling with disbelief. "He was my father's friend. He broke his spine when a falling beam crushed him while covering his comrades. How did he end up here?" Wu Heng didn't speak, but simply gestured for 'Internet Addict' to send an encrypted message to Dean and Sam's communicators.

The two quickly checked.

Information shows that Old Marcus volunteered to become a 'deep contact experiment subject' after learning about Wu Heng's plan.

He left behind a short but powerful last message: "This old body of mine has been paralyzed for seven years, and I've had enough of living. If I can use this crippled body to pave a path for those who come after me to fight against the devil, it's worth it!"

The message also included a biomarker signal at the end.

That was a miniature beacon that Wu Heng implanted in Marcus's body through a special method, used to monitor his vital signs and the flow of experimental data in real time, ensuring that the research process would not deviate from the preset 'beneficial mutation' trajectory.

In the event of uncontrollable malignant mutations or psychological corruption, the beacon will activate an emergency alarm procedure.

Dean looked at old Marcus's calm and resolute gaze on the screen, as if he could see through the screen and meet his gaze.

He slowly loosened his clenched fist, but the bulging veins on the back of his hand revealed the extreme repression in his heart.

He slumped back into his chair, as if all his strength had been drained, and lowered his head, his voice hoarse: "I understand. I won't act impulsively."

Sam patted his brother on the shoulder; he himself was also going through a period of inner turmoil.

If we go to save that child now, Marcus's sacrifice will be in vain; but if we don't, the child is suffering.

The struggle between reason and emotion made every minute and every second feel incredibly long.

Ultimately, reason prevailed over emotion; their sense of responsibility to the world overwhelmed their compassion.

They could only watch helplessly, waiting for an outcome that was neither hope nor even greater despair.

The next dozen or so hours were hellish torture for everyone in the barn.

They witnessed more failures, with test subjects collapsing in extreme pain, mutating into unspeakable monsters, and then being disposed of expressionlessly by the Plague Knight.

However, some positive changes were observed in a few 'volunteers', such as Old Marcus, who were extremely determined and had Wu Heng's hidden influence within them.

Their muscle density is slowly increasing, their wound healing speed is significantly improving, and they are showing some resistance to the mental pollution emitted by low-level demons.

Most importantly, they always remained rational!

The Plague Knight showed great excitement about this and focused even more on optimizing these 'successful' mutation paths.

Finally, in the early hours of the next day, the Plague Knight, in his core laboratory, let out a deep, satisfied laugh as he looked at a carefully prepared reagent that emitted a soft, emerald-colored luster.

"Perfect.!"

"By eliminating the madness and side effects, and retaining and amplifying only the resilience and strength of life itself, this is the true essence of evolution and the correct use of plague!"

He picked up the vial of reagent, his eyes gleaming with fanatical fire: "With this, even Lucifer will have to reassess my worth and will no longer be able to control me."

Just as he was preparing to perform the final data archiving and sample backup—
"boom!!"

Outside the sanatorium, violent explosions and intense bursts of holy light and hellfire energy emanated simultaneously.

"Enemy attack!" Jack shouted into the communicator. "It's demons, a lot of them, and angels too! They're fighting!" (End of Chapter)