Infinity: Kill your way through the movie world.

After Crowley left, only Dean and Sam remained in the room, along with the parchment on the table.

Dean walked over, picked up the paper, and began to examine it carefully.

The paper was old, with yellowed edges and intricate runes drawn on the surface in black ink. The ink was slightly reflective, as if it hadn't dried completely.

"Is he telling the truth?" Sam asked.

“Some of it should be true.” Dean folded the parchment and stuffed it into his coat pocket. “The part about Castio matches up perfectly: the words on the wall, the magic circle on the ground… but there’s definitely something to hide about his motives. Crowley wouldn’t help for nothing; he must have a purpose.”

"Then let's..."

"Find Lor first."

Balanced Field, Wu Heng's office.

The room was very simple, with a solid wood desk, two chairs, a bookshelf, and a global map on the wall. There were no decorations or personal belongings, just like a hotel showroom.

Wu Heng was sitting behind the table reading a report when Dean and Sam came in, but he didn't even look up.

"sit."

The two sat down.

Dean had barely sat down when he blurted out, "We need—"

“I know about Castio and Leviathan.” Wu Heng put down the report, looked up, and asked, “Crowley told you?”

Sam was taken aback: "How come..."

“I watched him leave that office building,” Wu Heng said. “From the moment you went in until Crowley appeared, until the conversation ended, I knew the whole story. The monitoring network of the Balanced Field has a coverage radius of fifty kilometers. Have you forgotten that?”

Dean took a deep breath: "So you knew Castio was in trouble all along, but didn't tell us?"

“What good would it do to tell him?” Wu Heng retorted. “Would you kill him? Or try to save him? Either way, you’d need time to prepare, and by then you’d still be getting used to your new bodies, and you’d even stumble while walking.”

He stood up, walked to the window, and turned his back to them.

“Now that you are ready, at least 80% of your physical coordination has been restored and your strength control has reached a basic level, so Crowley has appeared and given you a choice.”

"This was obviously something he had planned long ago."

Dean clenched his fist: "We don't want to kill him. Castio is our friend. He's saved our lives, more than once. There must be another way."

"for example?"

“For example…” Dean paused.

Sam chimed in, "For example, use Crowley's Binding Charm to immobilize him, and then try to separate Leviathan, whether by magic, ritual, or any other means you can think of."

Wu Heng turned around and looked at them.

His eyes were calm, like the water of a deep pool, unfathomable.

"I can tell you right now that the probability of a successful separation is less than three percent. Leviathan and Castio's souls are already intertwined. The most likely outcome of a forced separation is that they will both die, and the least likely outcome is that Leviathan will escape while Castio becomes a vegetable."

“But there’s still a chance, isn’t there?” Dean stood up. “Even if it’s only one percent, it’s worth a try.”

Wu Heng remained silent for a few seconds.

Then he slowly uttered a single word: "Okay."

Then he took something out of the drawer and placed it on the table. It was Dean's Demon Hunter Dagger, the new weapon that Grayson had forged.

The blade gleamed with a dark blue luster, and the patterns of angel feather powder and abyssal cold iron flowed slightly in the light.

“Stretch out your hand,” Wu Heng said.

Dean reached out his hand.

Wu Heng gripped the dagger, the tip pressed against Dean's palm.

There was no piercing of the skin, just a light touch. Then Wu Heng's other hand covered it, palm down, hovering above the dagger. The balance glove lit up.

First came a grayish-white light, like mist, that poured out of the glove and wrapped around the dagger. Then four-colored halos appeared: a dark red war, a ghastly green plague, a pitch-black famine, and... a void of gray, the color of death.

A portion of the Four Horsemen's power was also transferred into it.

The light wheel spun and accelerated, finally condensing into a thin stream of light, which flowed from Wu Heng's palm into the dagger.

The dagger began to change.

The patterns on the blade came to life, pulsating like blood vessels, turning from dark blue to dark gold, then to grayish-white, and finally stabilizing into a strange, chaotic color.

It seems to contain all colors at the same time, yet it also seems to contain no color at all.

Wu Heng withdrew his hand.

“The runes are finished.” He handed the dagger to Dean. “Pierce it into Castio’s heart, and the runes will activate. The effects are: first, to kill Castio’s physical body; second, to forcibly separate Leviathan from its fused state; and third, to open a temporary passage to Purgatory and stuff Leviathan back in. Of course, Castio will still die in the end.”

"This is just a safety net; if it's a last resort, you have no other choice."

He paused.

"If you use this dagger, pay attention to the order. Kill Castio first, then expel Leviathan, because Leviathan will only be forced to break free if its host dies."

“If the order were reversed, Leviathan might completely devour Castio’s soul at the last moment and complete its transformation. In that case, we would have to face a monster with the wisdom of angels and the power of purgatory.”

Dean took the dagger.

The hilt of the knife was warm, pulsating slightly in his palm as if it were alive.

"Is this the only way?" Sam's voice was hoarse.

“Yes, for you.” Wu Heng sat back in his chair. “I can take action myself, and the success rate will be higher, but the cost could be the destruction of half of South Dakota. You don’t want that, right?”

The two were silent.

“The choice is yours,” Wu Heng said. “Use Crowley’s Binding Curse to trap Castio, and try any method you can think of.”

He waved.

"Now, make a decision; time is running out."

On the way back, Dean drove with the dagger wrapped in a cloth on the passenger seat, while Sam sat beside him, staring at the scenery rushing past the window.

“We won’t use it,” Dean said suddenly.

"But what if all other methods fail?"

“Then let’s keep looking for other methods!” Dean interrupted him. “Magic, rituals, relics, anything, there’s always something that can separate them without killing him.”

Sam didn't say anything.

He knew what Dean was talking about; they were talking about Castio, but also about each other.

If one day any of them were possessed, controlled, or merged with something, they would hope that the other would save them at all costs, rather than killing them for the sake of the "greater good."

This is a promise made by brothers, and also a weakness.

But this is also the shining point of their humanity, the part that can inspire others. If Wu Heng were the one who was inspired, they would have done the same.

The car drove to an intersection, and the light was red.

Dean stopped the car, tapping his fingers on the steering wheel. Suddenly, he looked at the dagger.

“The power of the Four Horsemen…” he murmured, “The Death Knight… old man…”

"What do you want to do?" (End of Chapter)