Eddie stared at the ceiling for a long time after Isabella left the room.
The crystal's glow was gone. The room was the same as it had been - same fire, same dim light, same smell of herbs and old stone. Nothing had changed in any visible, measurable way.
Eddie felt like the floor had quietly moved three feet to the left.
"Did you know?" he asked.
A pause.
"…No."
"You're sure about that?"
"We would have mentioned it," Venom said, with the particular flatness that meant he found the question mildly insulting. "'By the way, Eddie, you appear to be developing magical abilities' is the kind of thing we would have brought up."
"Just checking," Eddie muttered.
He pushed himself slightly more upright against the headboard, staring at nothing in particular. His mind was doing the thing it did when it had too much to process - running in tight, fast circles, looking for a way in.
"So how?" he said. "How does a guy with zero magical history, zero magical family, zero magical - anything - end up with a core that makes Isabella's crystal light up like a Christmas tree?"
Silence for a moment.
Then Venom said, "Think about where we have been, Eddie."
"I'd rather not, actually."
"Too bad. Think."
Eddie thought. He did not enjoy it.
"Space," he said flatly. "The void. Floating between - whatever that was."
"Not just space," Venom said. "Not the kind of space that has stars in it and follows rules. What we drifted through after Knull - that was the space between. The place that exists in the cracks of things. Between dimensions. Between timelines. Between what is and what could be."
"You're describing it like you know exactly what it was."
"We are describing it like we have a better frame of reference than you do," Venom replied. "Which we do. We have been in space before, Eddie. Real space. That was not real space. That was something older."
Eddie chewed on that. "Okay. So, we drifted through something ancient and weird between dimensions. What does that have to do with me suddenly having a magical core?"
"Everything," Venom said. "Think about what a magical core is. Isabella described it - something within the body, connected to the mind and soul. A fundamental energy. It responds to will, to emotion, to intent." A pause. "Eddie, what do you think the void between dimensions is made of?"
Eddie opened his mouth. Closed it.
"…Energy," he said slowly.
"Fundamental energy," Venom corrected. "Raw. Undifferentiated. The kind that predates any particular universe's rules about what is and isn't possible. We floated in it for - we do not know how long. Time was not functioning correctly. It could have been hours. It could have been significantly longer."
"And it just - what - soaked into me?"
"Soaked is not the word we would use," Venom said. "We were not passive in that space. We were barely holding together. You remember - our bond was fractured, our form was collapsing, your body was failing. We were pulling in everything we could find just to maintain basic coherence." Another pause. "It is possible that in doing so, we pulled in more than we intended."
Eddie stared at the ceiling.
"So, you're telling me that when we were literally dying in the void between dimensions," he said, "we accidentally absorbed ambient fundamental energy, which then settled into my body as a magical core."
"We are telling you it is the most logical explanation," Venom said. "You did not have a magical core before Knull. You have one now. Something changed in between. The void is the only candidate."
"That is insane."
"We have been eaten by a cosmic god and spat out into 1978 England," Venom said. "Recalibrate your baseline for insane."
Eddie let out a short, involuntary laugh despite himself. "Fair point."
He was quiet for a moment, turning it over. It had the shape of something true - not comfortable, not convenient, but internally consistent in the way that real explanations tended to be. The void. The drifting. The desperate, half-conscious scramble to hold themselves together long enough to matter.
They had pulled in something they didn't know was there.
And it had stayed.
"Okay," Eddie said. "Okay. So, the core exists. I'll accept that." He paused. "But Isabella said it's grown. Since we got here. Since the Cruciatus." He frowned. "That part I don't follow. The torture made it bigger?"
Silence.
A beat longer than usual.
"Macnair," Venom said.
One word. Flat. Satisfied in a way that Eddie recognized immediately.
Eddie went very still.
"…Venom."
"Yes."
"When you went through him-"
"Yes."
"You didn't just - incapacitate him. You took something."
"We took several things," Venom said, with the unrepentant calm of someone who did not consider this a moral grey area. "His magic was - interesting. Different from what we had absorbed in the void. Structured. Shaped. It had been trained and used and refined over decades." A brief, dark pause that Eddie could only describe as appreciative. "It was significantly tastier."
"You ate his magical core," Eddie said.
"We consumed his magical essence, yes," Venom confirmed. "And as with most things we consume, what was useful was retained. Integrated. The rest was discarded."
"And the useful part ended up in me."
"Where else would it go?"
Eddie pressed his fingers briefly to his forehead. "So, our core - my core - is a combination of ambient void energy we accidentally absorbed while dying, and whatever was left of a Macnair's magical ability after you were done with him."
"That is an accurate summary, yes," Venom said.
"That is deeply weird."
"Again," Venom said, "we would like to remind you of the baseline."
"I know, I know. Cosmic god. 1978. Recalibrate." Eddie dropped his hand. "I'm just saying. If I ever do figure out how to use this - whatever it is - it came from Macnair. Part of it."
"Does that bother you?"
Eddie thought about Macnair. The skull mask. The wand levelled at his chest. The Cruciatus landed before he could draw a breath to speak.
"No," he said honestly. "Not even a little."
"Good," Venom said. "It shouldn't."
Another silence. More comfortable than most.
"One more thing," Eddie said. "Isabella said it grew after the Cruciatus specifically. Not just from Macnair. From being hit with the curse itself."
"Trauma," Venom said simply. "She mentioned it herself - certain extreme experiences force the core to develop in ways normal training never would. The Cruciatus is not a normal experience. It is designed to attack the mind and soul directly." A pause. "It attacked. The core responded. It is not complicated, Eddie. You have been through worse than a torture curse and come out the other side with more than you went in with. This is consistent with your entire history."
Eddie blinked.
"Did you just - was that a compliment?"
"It was an observation," Venom said immediately.
"It sounded like a compliment."
"It was not."
"It really did, though-"
"Eddie."
"I'm just saying, if you want to tell me I'm resilient, you can just-"
"We will consume you," Venom said, with great dignity.
"There it is," Eddie said. "There's the guy I know."
The fire crackled across the room. Somewhere outside, the Sheffield morning had progressed far enough to produce a weak and watery sun, visible through the small window as a pale brightening of the cloud cover rather than anything so bold as actual light.
Eddie sat with it all for a moment - the void, the core, Macnair's stolen magic sitting quietly inside him like a tenant who hadn't asked permission, the Cruciatus that had somehow done him a favor in the process of trying to destroy him.
Deeply weird, all of it.
But then Venom wasn't wrong about the baseline.
"Isabella will have questions," Venom said, after a while. "When you tell her."
"Yeah," Eddie said. "She will."
"Are you going to tell her?"
Eddie thought about the crystal. The way it had glowed without asking his permission. The way Isabella had set it down carefully before delivering the verdict, as if she needed both hands free for the weight of it.
She was going to figure it out regardless. She was too careful and too observant for anything less.
"I think," Eddie said slowly, "she's already halfway there."
"Mm," Venom said.
"Yeah," Eddie agreed.
And outside, the pale sun did its best against the Sheffield clouds, and inside, the fire burned low and steady, and somewhere in the quiet of a 1978 English winter, something that had never existed before - a thing made of void energy and stolen magic and sheer stubborn survival - continued, without ceremony, to grow.