Morning came through the eastern window the way it always did now — the light finding the room with the unhurried certainty of something that knew where it was going.
They lay in the comfortable quiet of two people who had stopped needing to fill mornings with words and could let them be what they were.
"Rogue," Raven said, eventually.
"Tomorrow," Ethan said. "If she's up for it."
"She'll be up for it."
"You sound confident."
"I know her," Raven said. "She'll pretend she needs to think about it and then agree immediately."
He turned his head to look at her. "You've already thought about how to ask her."
"I've already asked her," she said. "Last night, after you fell asleep. She pretended to think about it for approximately four seconds."
He looked at the ceiling. "You planned this entire thing."
"I'm transparent about it," she said, which was technically different from denying it. "Today is ours. Tomorrow is research."
"Research," he said.
"Observational," she said. "Into whether there's anything real there. For science."
"For science," he said.
The corner of her mouth moved. "Get up. I want to spar."
---
The grounds had the specific quality of December in the northeast — the grass stiff and pale, the air carrying the particular clarity of cold that hadn't yet committed to snow but was considering the question seriously. The sky was the flat white of a day keeping its options open.
They faced each other with the familiar ease of people who had done this enough times to have developed a specific language between them — the way she held herself when she was setting up a sequence, the tells he'd catalogued that she'd started correcting when she noticed he'd catalogued them, the ongoing refinement of a dynamic that was getting more interesting as it got more practiced.
She came in with the approach she'd been developing — the low entry with the leverage principle, the hold that required him to either use strength or accept the positional disadvantage. He accepted the positional disadvantage. This was the game they'd developed: he stayed within the technical frame, she tried to find positions that the technical frame couldn't get him out of, and the tension between those two things was the interesting part.
She got four holds.
He appreciated all four of them in ways that were technically relevant to the spar, and also not only that, which she was aware of and did not appear to consider a problem.
The fifth attempt, he read early and slipped, turned the position, and ended up with the advantage for the first time in their sparring history — the hold clean, the technique sound, nothing he'd been born with used to achieve it.
Raven was still for a moment.
"Hm," she said.
"I've been practicing," he said.
"When?"
"In my head," he said. "Watching how you move. Running the sequences." He paused.
She considered this with the precision she applied to things that deserved it. "Best of seven," she said.
"Four to one, your favor," he said. "You're already ahead."
"Best of seven," she said again.
He let her go.
---
They ended up on the grass in the weak December sun afterward, which was not a planned outcome and was also an entirely natural one, the spar having concluded in the specific way sparring sometimes concluded between people who were also other things to each other.
The sun was doing its work regardless of the season — he could feel the absorption continuing at its steady rate, the cells doing what they did under Earth's yellow light. December sun was less than July sun, but the difference was in quantity rather than quality. He still gained.
"Do you ever feel cold?" he asked.
Raven looked at him from where she was lying on the grass, the blue form in the December light, something he found he never got tired of looking at and suspected he never would.
"What brought that on?"
"You're transforming your own skin," he said. "In your blue form, you don't have clothes in the ordinary sense. I was thinking about whether the cold actually reaches you."
She was quiet for a moment, considering. "Not really," she said. "In temperate cold — like this — nothing. When I was in the far north once, knee-deep in snow, I felt something. Mild. Nothing like what you'd expect." She paused. "I've never been sure whether that's the mutation or just how I'm built."
"Both, probably," he said. "But it made me think about something."
"Of course it did," she said.
"Your mutation is transformative at a fundamental level," he said. "You don't just change the surface — you change the actual biological structure, the voice, the height, the weight distribution. You become someone else at a cellular level, not just an appearance of them." He was looking at the sky now, thinking through it. "So theoretically — if you can make your skin denser to resist impact, or alter the composition to insulate against cold—"
"I've done some of that," she said. "Instinctively. Never consciously."
"Which means the capability is there," he said. "You just haven't mapped it deliberately." He paused. "But that's the smaller thing. The bigger thing is—"
"Here we go," she said.
"You copy people's forms," he said. "Voice, appearance, physical structure, down to the cellular level. And when you maintain a copy long enough, you start to develop echoes of their mannerisms, their behavioral patterns—"
"Where are you going with this?"
"Why don't the powers come with the copy?"
She was quiet.
"Because your power is the building block—" he stopped himself. He knew why, from information he wasn't sharing, but the question was genuine because the conclusion he'd arrived at from that information was something he wanted to test against her thinking. "I mean — the copy is complete in every other sense. Why would the powers be the exception?"
Raven sat up. The expression on her face was the one she wore when something had arrived in her thinking that was worth taking seriously. "Every time I've tried," she said slowly, "the powers just weren't there. Copying someone who can fly doesn't mean I can fly."
"Right," he said. "But what if the limitation isn't the power's ability to transfer — what if it's your understanding of how the power works? Like—" he reached for the example "—Bobby's ice. On the surface, it looks like he's making things cold. But the actual mechanism is molecular — he's slowing particle movement, and the cold is the effect of that, not the cause." He paused. "What if your mutation can't copy a power until you understand what it fundamentally is? Not what it looks like — what it actually does at the level of physics or biology?"
She stared at him.
"If you understood the mechanism," he continued, "your mutation might be able to transform your cells to replicate it. Not borrow it — actually become capable of it. Even if only temporarily."
She was quiet for a long moment. The kind of quiet that meant something was being turned over carefully rather than quickly.
"That's either completely wrong," she said, "or it's the most significant thing anyone has ever said to me about my own powers."
"Probably one of those," he agreed.
"Let's test it," she said, sitting up fully.
---
The question of which power set to use as the test case occupied them for a few minutes.
Logan was the obvious answer and the wrong one — the mechanics of the bone mutation and the healing factor were so intertwined with his physical structure that copying them would require fundamental skeletal transformation, and the claws meant something painful happened every time they extended, regardless of how used to it he was. Not a good starting point.
Rogue made sense.
The mechanism was well-defined once you understood it: the absorption of life force through skin contact, the temporary acquisition of abilities from prolonged contact. The biological basis was specific enough to be understood, straightforward enough to be explained, and the test case was available — the trees around the grounds, with their root systems and their own biological processes, would register the siphoning clearly.
"Walk me through it," Raven said. "What do you understand about how it actually works?"
"It's bioelectric," he said. "Everything alive generates a bioelectric field — it's the background current of biological processes. Rogue's mutation interfaces with that field through skin contact, disrupts it, and draws it through her. The disruption is what feels like the sapping — the field destabilizes at the point of contact, and the energy moves toward her instead of staying contained in its source." He paused. "When the contact is sustained long enough, the field transfer becomes deep enough to include the information structure — the patterns that encode ability — and those transfer too."
Raven was listening with the complete attention she gave to things that mattered.
"So the transformation your mutation would need to make," he continued, "isn't surface. It's at the level of the cells that are doing the touching. They'd need to become capable of generating the disruption field rather than just passive contact." He paused. "It's a change in what your skin does, not what it looks like."
She was quiet for a moment.
"Okay," she said. "Give me space."
---
The transformation into Rogue's form happened with the usual ease — the auburn hair, the white streaks, the specific configuration of someone who had been paying close enough attention to replicate down to the texture of the clothing.
Then she stopped.
He watched.
She was still, which was not her usual mid-transformation quality — this was the stillness of someone directing attention inward, the focused concentration of a person trying to do something at a level they didn't normally consciously access. Her expression was the one she wore during difficult technical work.
He stayed quiet.
Five minutes. Six. Seven.
At nine minutes, something changed in her posture — slight, a different kind of stillness, the quality of someone who has felt a thing and isn't sure yet what it is.
At ten minutes, she said: "Something shifted."
She looked at the oak tree nearest to her.
She reached out and put her hand flat against the bark.
The tree's leaves — the few remaining ones, the stubborn December hold-outs — began to yellow at the edges. Not the natural December yellowing. The specific, faster process of something being drawn from them. The bark under her hand darkened slightly, the moisture receding.
She pulled her hand back.
They both looked at the tree.
"That worked," he said.
"That worked," she said, with the specific quality of someone who had expected to be trying and was surprised by succeeding.
The next moment, they were both moving — the simultaneous, wordless decision of two people who had just done something significant together — and he had his arms around her, the full hug, genuine and present, and she hugged back with the particular fierceness of someone who had just found a door in a wall they'd been living beside for years.
"This changes everything," she said. Not the dramatic version of the statement. The simple, true one. "Everything about how I've been thinking about what I can do. If this applies to other powers — if I can learn the mechanism of enough of them—"
"You can build an arsenal," he said.
"Not just an arsenal," she said. "Understanding. Every power I learn, the mechanism of — I actually understand something about how mutation works. How does biology implement the ability?" She pulled back to look at him. "This is — Ethan, this is genuinely—"
"I know," he said.
She looked at the tree, then at her hands, then at him, with the expression that was moving through several phases of this is real and I need to organize what it means.
"Try to focus on the feeling of it," he said. "The shift. So you can find it again without the ten minutes next time."
She nodded, already turning the experience over internally.
He looked at her — the Rogue configuration, the auburn hair and white streaks, Rogue's face animated by Raven's expressions, which was a combination that was genuinely strange in the specific way of something that was two true things occupying the same space.
"Raven," he said.
She looked at him.
"You're still in her form."
She looked down. Looked at her hands. Looked up at him with the expression of someone who had been so absorbed in the discovery that the surface-level management had lapsed.
A pause.
"I know," she said, and the smile that came with it was entirely hers regardless of whose face it was on. "Get used to it."