It started with a thought that didn't feel like his.
Chris was knee-deep in the western grove, working through the morning routine of checking growth and directing nutrients through the Critic's root network, when the idea just... arrived. Neat. Clean. Fully formed. The kind of idea his brain almost never produced on its own.
The thorn vines along the southern approach needed to be doubled. Not just reinforced but restructured. Two layers staggered so anything pushing through the first would get channeled into the second at an angle that would slow it before it ever reached Korr's kill zone near the broken ridge.
He blinked, fingers still pressed into the soil. He could see exactly how it would work. Which nodes to strengthen. Where to thin and where to thicken. He'd been thinking about the southern approach for days without arriving at anything close to this specific, and now here it was.
'That's... actually really good,' he muttered, already crouching lower to start redirecting growth.
He was halfway through the second layer when another thought arrived. Different this time. Not about defenses at all.
Oswin should leave within the week. Not because he'd outstayed his welcome but because the first trade run needed to happen while the paths through the northern Barrens were still passable before the dry season deepened. If he left now he'd reach the borderlands in roughly three weeks, establish contacts, make initial sales, and return before the worst heat made the crossing impractical. Timing was everything in trade. Start too late and you missed the window.
Chris slowly pulled his hands from the dirt.
He didn't think like that. He didn't know enough about trade routes and seasonal windows to generate that level of practical detail from nothing. Oswin probably mentioned something about it at some point, but the thought hadn't come from memory.
It had come from inside.
He looked down at his hands. The bark patterns on his knuckles were darker than they'd been a week ago, the black Rootmind lines tracing thin paths beneath the skin. He could feel the network humming around him, every plant in the village connected through the pulse that lived in the base of his skull. A second heartbeat he'd stopped noticing.
Which meant he'd also stopped noticing when something else started using it.
He didn't panic. He'd spent over a year learning that panicking about the Voice only fed it. But he didn't ignore it either. He sat very still and paid attention to the silence behind his own thoughts.
There. Faint. Like hearing a conversation through a wall.
It wasn't words. More like pressure. A gentle nudge in the direction of whatever he was already thinking about, sharpening it, completing it, making his ideas better than they had any right to be. The Voice wasn't threatening him. It wasn't guilting him, instead it was helping him.
'That's a lot worse than before…' he thought.
Chris stood slowly, wiping his hands on his thighs. The thorn vine he'd been working on reached after him before settling into its new configuration.
"Stop." He said it quietly but not to the vine.
A faint pressure seemed to withdraw. Not completely, but enough that his thoughts were his own again. Everything felt slightly slower and slightly less certain. He hadn't realized how much of his thinking over the past few days had been sharpened by something that wasn't him.
The Rootmind was the obvious next step. He walked to the center of the village and knelt in front of it, pressing his hand against its surface.
"Something's been using you."
The Rootmind's response was complicated. Not words but impressions. Awareness. Confusion. A faint sense of something that had been close and then pulled away. It hadn't felt violated. It had felt useful.
'That's the trap,' Chris thought. The Rootmind couldn't tell the difference between his intentions and the Voice's because the Voice had learned to make its intentions feel like his. Same frequency. Same texture.
"How long?" Chris asked.
The Rootmind didn't have a clean answer. It measured in pulses and connections, not hours. But the something-that-wasn't-Chris had been flowing through it for longer than it could distinguish from his own presence. Not weeks. But days. Long enough to shape a dozen small decisions.
"From now on I want you to filter it." Chris's voice was firm. "Anything that comes through you that doesn't come from me, flag it but don't block it yet, I just need to know it's there but also don't let it in without telling me first."
The Rootmind considered this. Chris could feel it turning the idea over, testing it. Its nature was connection and flow so this was something new it wasn't sure about. What Chris was asking for was judgment and the ability to tell the difference between two things that felt identical. It wasn't sure it could do that.
"I need you to try, it's to help keep me and everyone around us safe."
That as all the prompting it needed, its first attempt was clumsy and uncertain, Chris could clearly feel it but it was functional as he could feel it now, a pulse that came through from outside, from the thing in the dungeon ever so tentatively and seemed to be slowly closing that linked to the source of his recent 'thoughts' such as reinforcing the bamboo along the eastern wall where the morning sun weakened the outer stalks. It was solid and practical advice but not from himself.
This time the Rootmind's flag was like a faint bell. Clear enough to notice as the thought arrived, the bell rang, and Chris set it aside.
"I see you," he said to the empty air.
Nothing responded. But the pressure shifted, and he got the impression of something reevaluating and he knew it was the Voice.
He found Korr near the southern approach a little while after seemingly studying the new thorn vine configuration.
"This is different." Korr finally said but didn't look up. "Far more sophisticated than your usual work. The channeling angle is something I should have suggested myself, I must say its well done."
"I didn't think of it," Chris said plainly.
That had Korr's red eyes turn towards him as he quickly realized what he meant. "The Voice."
"Not directly," He shook his head with a frown. "It's been feeding ideas through the Rootmind well making them feel like mine and while they are good ideas and proven useful they aren't mine."
"You still used them though." He pointed out sharply.
"I used them without knowing they weren't mine, there's a difference…" Chris said weakly but even he didn't seem to entirely believe it.
Korr straightened. "Is there? A tool is a tool regardless of where it comes from, boy. If the Voice sharpened your thinking enough to produce that," he gestured at the thorn field, "then perhaps the solution is to use the sharpening while taking care to not be cut by the blade."
Chris rubbed the knot mark on his wrist. "No. Theron told me once during a lesson that well the strong make the rules and the weak follow there's a difference between being strong and being used. The moment I start deciding that useful ideas from the Voice are acceptable, I start considering what else from it might be acceptable. It's a slippery slope."
He looked at the double layer of thorn vines. "The problem is that it doesn't just look like improvement but actually is an improvement, and that's what makes it so much more dangerous."
Korr was quiet for a long moment, the Barrens wind moving between them.
"You've spent over a year building this place from nothing," he said eventually, his voice rougher. "And now it's trying a new way to try and get to you? Using the thing you're most proud of against you this time rather than temptations and promises?"
"Yes."
"What do you do plan to do about it?"
He was silent for a moment, considering what he could od and should do, "I build something better well using its thoughts as little more than suggestions or guides. The Rootmind wasn't designed to discriminate but rather to have a better link to my plants, it was designed to connect all of them and evolved to include even me into that it seems, so what I do is redesign it. If I can teach it to recognize the Voice's fingerprints, I've turned its best new weapon into something that works against it. Using only what I feel will aid me and my growth well refusing to the more extreme suggestions."
Korr raised an eyebrow. "You're going to train your own plants to reject a part of a parasite that's no doubt been doing things like this longer than your village has existed?"
Chris just laughed as he replied, "I've been doing impossible things since I got here."
"Don't tell the Voice that, boy. It might take it as encouragement." The mild feeling he got showed it took it more as a challenge than encouragement.
Chris worked through the afternoon and into the evening with the Rootmind. The world tree helped where it could, its small manifestation, having grown quite a bit and seemingly a bit more mature bounced around the Rootmind's dark figure in their shared mental space, trying to explain what Chris felt like versus what the other thing felt like.
"You're both warmer than the other things," the world tree said at one point.
"That's the most useless thing you've ever said," the Critic snapped back. "It feels like the difference between rain that feeds the soil and rain that drowns or washes it away."
"I know you're both trying to help but can you please just shut up and let me focus a little bit? I don't want it to lead to the others also trying to explain and leading into a loud mess of noise that confuses it."
By the time the sun dropped below the western ridges, the Rootmind could confidently flag a bit under half the Voice's attempted infiltrations. Not even close to all of them just yet but it was far better than zero, and zero was what he'd woken up with that morning.
He sat with his back against the Rootmind's stem as the night settled in, feeling the network pulse around him. It felt a lot more aware now, like a muscle that had learned to flex in a new direction without straining.
What bothered him the most though wasn't how the Voice had found a new way in. It was that the ideas it had been feeding him were really good. The restructuring of the thorns was genuinely better than it was before and he figured the trade timing for Oswin was correct, having had even confirmed it with the merchant that afternoon. The bamboo reinforcement idea was also quite sound.
The Voice wasn't trying to hurt him or tempt him or even directly take control. It was trying to make him dependent on it without him realizing it, one useful idea at a time without him being able to tell the difference between his own mind and something wearing it like a coat till it was too late.
Sera appeared beside him at the eastern edge of the village, the dungeon cliffs visible against the starless sky, unnervingly quite without even a trace of any beasts.
"You've been different today, a lot quieter. The thinking kind. The dead Minotaur still troubling you or the Centaur warning?"
Chris shook his head before telling her everything that happened, about the Rootmind infiltration and the crude filter he set up, about the ideas that had slipped through and how they were surprisingly good. She listened without interrupting, her fingers playing with a loose fray of leather on her sword hilt.
"I would say it's like being poisoned through food," she said when he finished. "You wouldn't notice the toxin because it tastes like the meal and only realize it when it's too late."
Thinking it over he realized how similar that was. "Yeah, exactly like that."
"And you're going to undo the defenses it helped you make?"
Chris paused. "No. I've rebuilt every piece with my own hands since I figured it out. The Voice planted the seed but I grew the tree." He rubbed the knot mark on his wrist. "But I'm not going to forget where they came from and will be far more careful from now on. I can't afford to lose this benefit but I will be far more careful going forward now that I know its there."
She was quiet for a moment. Then she reached out and put her hand on his shoulder. Brief. Almost awkward. Like someone who'd forgotten how the gesture worked but remembered that it mattered.
"You caught it and that's what counts. Most people don't and the choice to use it for your benefit is no doubt the right one."
He snorted with a small grin. "Most people don't have a parasite that's learned to fake their own thoughts."
"Most people don't have a plant called a 'Rootmind' that can learn to filter it well connecting to his entire village either." She let her hand drop. "You're not fighting this alone. You're just the only one fighting it on the inside well we handle the outside, not just me and the demon but even the plants, don't think I don't notice the root almost always wrapping around your ankle. It does that because it loves you."
He almost laughed at that, "It's because it's possessive."
"Those aren't mutually exclusive tough."
Chris did laugh that time. The whole day had been grinding and somehow Sera had made it feel carryable.
"Go and get some sleep," she said. "The filter won't hold if you're too tired to notice the times it fails."
He walked back through the village toward his hut, the Rootmind pulsing with a careful new awareness around him. The flagging system working ever so steadily.
He paused at his door and looked back at the green sprawl of his village against the dead and dusty Barrens.
He'd have to adapt to it. More vigilant and begin to be suspicious of his own thoughts but the Rootmind was learning.
It had tried fear, guilt, logic and now seemed to be trying to use usefulness disguised as his own thoughts.
He fell asleep with the world tree's root wrapping loosely around his wrist rather than resting next to his pillow.