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The clinic was quiet, almost unnervingly so. Beacon Hills' night air had a chill to it, and the lamps outside Deaton's building flickered softly, casting long shadows across the driveway.
Inside, the walls were lined with medical books, vials of herbs, and shelves of carefully labeled specimens. It smelled faintly of antiseptic and old parchment—like a library crossed with a laboratory.
Scott, Allison, Stiles, and Jackson entered cautiously, the events in the forest still echoing in their minds. Stiles clutched a backpack full of flashlights, first aid kits, and what he insisted were "emergency snacks in case we die and get hungry."
Deaton was waiting in his office, hunched over a microscope. He didn't look up immediately, but his sharp eyes gleamed in the dim light. "You encountered it?" he asked quietly, without preamble.
Scott nodded. "Yeah. Mutated… deer, massive, aggressive. It almost killed us."
Allison placed her bow against the wall, leaning back slightly. "It's unlike anything normal in the forest. Its strength, speed… even its intelligence—it seemed deliberate."
Stiles leaned forward, eyes wide. "Deliberate, yes. It was like the deer was auditioning for a role in some sort of murder ballet. I got front row seats! And let me tell you, the choreography was killer—pun fully intended!"
Deaton's lips twitched, though he didn't comment. Instead, he gestured for them to place the deer's remains on a large metal table. The body had already been partially prepped—Scott and Allison had ensured it was transported carefully—but its size and mutations made it intimidating even now.
Jackson backed off slightly. "I still can't believe we fought that thing. Like… a deer that's basically Godzilla with antlers."
Stiles added dramatically, "Yeah, Jackson. And you didn't even get to throw a punch. You're the spectator of shame in this episode."
Jackson glared but didn't reply, letting the argument pass.
Deaton worked silently, taking samples, examining the tissue, and running quick tests with reagents that sizzled and changed color in his hands. "These mutations…" he murmured, mostly to himself. "They're… unnatural."
Scott leaned closer. "Unnatural how?"
Deaton tapped the creature's blood under the microscope. "The cellular structure is enhanced. Regenerative proteins, accelerated neural pathways… it's been modified. Someone has interfered with the natural evolution of this animal."
Allison frowned. "Someone?"
Deaton nodded grimly. "Yes. This was engineered. By someone who understands the supernatural intimately, someone who knows what they're doing. The enhancements aren't random—they're designed to survive combat, to learn, to react."
Stiles clutched the edge of the table. "So, basically… someone out there is playing Pokémon but with angry forest animals? That's terrifying. And by terrifying, I mean totally unfair."
Scott's jaw tightened. "Do we know who?"
Deaton shook his head. "Not yet. But there are traces—faint remnants of blood from an unknown donor. Something very old… very powerful."
Stiles perked up. "Old and powerful? That's my specialty! Wait… no, my specialty is sarcasm. But old and powerful… sounds like a Saturday-night horror show for us!"
Allison rolled her eyes, though she remained tense. "Does it connect to Arthur?"
Deaton's gaze flickered. He hesitated, then nodded slightly. "Possibly. I saw him during your encounter tonight, though he did not intervene directly. Whoever is manipulating these creatures may be testing… or preparing. Arthur's presence is a stabilizing factor in Beacon Hills. The moment he steps in, the balance shifts."
Stiles whistled softly. "Ah… the mysterious, brooding, white-haired guy who shows up when things get nasty. I like him already. Maybe he'll teach me to fight deer monsters, huh?"
Jackson muttered, "We don't have time for jokes, Stiles. Something's creating these monsters. And if it's connected to Arthur… I don't even want to think about the scale of it."
Deaton continued to work silently, pulling out samples of antlers, blood, and tissue. "I can run a full analysis on these mutations," he said, "but I need more information. The frequency of appearances, locations, behavior. Someone—or something—is using Beacon Hills as an experiment ground. We need to know why."
Scott exchanged a glance with Allison. "You think this is why the deer attacked us? Not random aggression?"
"Precisely," Deaton replied. "Animals don't act this way without external influence. There's intelligence behind these mutations. Patterns, strategy, learning… the forest is becoming a battlefield."
Stiles perked up again. "Ooh! I love the word battlefield. Makes me feel important. And yes, Jackson, you're still the spectator of shame."
Jackson groaned, running a hand down his face. "Stiles, if you get eaten first, I will personally blame you."
"Noted!" Stiles said brightly. "But statistically, I'm the one most likely to survive. You, Jackson? High probability of being lunch meat. Front row spectator luck doesn't cover that."
Deaton ignored them both, his gaze sharp. "We also need to consider the Corvinus bloodline. The enhanced abilities in you Scott, Allison, and your allies… the serum Arthur's overseeing may be one reason these creatures have not overrun the town yet. Whoever is responsible may be trying to gauge the limits of your enhancements."
Allison frowned. "So this is about testing us?"
"Testing you," Deaton confirmed. "Testing Arthur's influence, testing the town's defenses, testing the limits of natural predators under supernatural manipulation."
Scott's eyes narrowed. "So the attacks are going to escalate?"
Deaton's nod was grim. "Yes. And soon. The forest is a living experiment. Every encounter, every mutation, every attack… it's feeding into a larger pattern. Whoever is behind this is intelligent, methodical, and patient."
Stiles bounced lightly on the balls of his feet, as if he could contain the anxiety with kinetic energy. "So basically, we're the underpaid lab assistants in some super creepy science project. Great. And I didn't even get hazard pay!"
Jackson sighed. "We need a plan. If this is happening now, the next attack could be worse. Larger… smarter. And stronger."
Deaton placed a reassuring hand on Scott's shoulder. "I'll help you track patterns, analyze the mutations, and strengthen defenses. But you must be cautious. The more direct the engagement, the higher the risk. Observe, collect, report."
Allison placed her hand lightly on Scott's arm. "Then we fight smart. Together."
Stiles grinned, leaning over the microscope. "Together! Like a dysfunctional, supernatural Avengers. Minus the spandex… I mean, mostly."
Jackson shook his head but couldn't help the small smirk tugging at his lips. "I just want to survive until morning. That's the plan."
Deaton's gaze swept the room one last time. "Beacon Hills is no longer a quiet town. Your territory has become a chessboard. And every piece is moving… whether you see them or not. The next moves will be critical."
Outside, the forest whispered. Somewhere in the distance, eyes glowed faintly in the trees. Arthur Corvinus stood in the shadows, observing silently, crimson eyes glowing under the moon. The creatures he had been keeping in balance were starting to stir on their own.
And far above, a pale figure watched from a ridge line, noting every movement, every reaction. The Covenant of Ash had already taken interest in the new players of Beacon Hills, recording, analyzing, and waiting for the right moment to act.
Inside the clinic, the four teens huddled together, unaware of how deeply entwined they were now with the larger forces moving in the shadows. For Scott, Allison, Stiles, and even Jackson… the hunt had only just begun.
Outside, the wind carried a faint scent of pine and blood. The forest was alive. The night was awake. And the experiments had begun.