AI The Heartstone Pendant had gone hot three steps ago.
Aurora stopped at the edge of the ancient oak circle, her breath fogging in air that should not have been cold. Beside her, Nyx had thinned to a silhouette, their edges bleeding into the midmorning light as if uncertain whether to occupy the same plane as the trees.
"You feel it too." Not a question. Nyx's voice came from everywhere and nowhere at once, a whisper threaded through the gap between wind gusts.
"I feel something."
The standing stones rose around them in a crooked ring, each one carved with symbols that seemed to shift when she glanced away . Moss crept up their flanks in patterns too deliberate to be natural, spiralling and curving with a logic that tugged at the back of her mind without ever quite resolving into meaning. The boundary. That was what Isolde had called it two nights ago, in Silas' bar, her lavender eyes catching candlelight as she traced absent patterns in spilled beer. *What you seek stands at the threshold of two worlds. To find it, you must first lose your footing in this one.*
Lost her footing. Right.
Rory flexed her fingers against the crescent scar on her left wrist, a habit from childhood she had never quite shaken. The pendant pulsed again, warmer now, a heartbeat pressed against her sternum. Whatever waited beyond those stones knew she was coming .
"We don't have to do this." Nyx had solidified slightly, their faintly glowing violet eyes the only fixed point in a body made of dusk. "Isolde's invitations are rarely what they seem."
"Didn't realise you were the cautious type."
"Caution is how I have survived four centuries. You, however, are practically a spring chicken."
Despite everything, Rory almost smiled. "Charming."
She stepped through.
The world folded.
Not violently, not painfully, but with a soft insistence, like turning a page in a book only to find the next chapter written in a language she had not known she could read. The Richmond Park landscape dissolved into mist, then reformed, then dissolved again, settling finally into something else entirely.
Her boots pressed into soil that hummed beneath her. Not quaked. Hummed. As if the ground itself remembered a song it had forgotten how to stop singing.
The first thing she noticed was the colour. Everything here burned.
Wildflowers carpeted the clearing in a riot of impossible hues, petals shimmering with shades she did not have names for. A bloom near her left foot pulsed in soft violet, its neighbour in burnt amber, and beyond that, blossoms that seemed to hold captured starlight, their centres flickering with tiny constellations of their own . The air tasted of honey and woodsmoke and something sharper beneath, ozone, the metallic charge that gathered before a lightning strike.
No birds. No insects. No rustle of small creatures in the undergrowth. The silence was wrong, a held breath rather than an absence, as if the grove were listening for something it had not yet heard.
"Well." Nyx's form had gone strange at the edges, blurring as if they could not decide whether to be fully present in this place. "This is new."
"New for you?"
"I existed between worlds for three hundred years. This place does not sit in any gap I have ever slipped through." A pause, and when they spoke again, their voice had shed its usual playfulness. "It sits beneath them."
Beneath. Rory filed that away and pressed forward, the pale stone path unfolding beneath her feet as if it had been waiting for her weight .
The grove opened around them in stages, each step revealing a new layer of strangeness. Trees with bark like polished obsidian rose in dense clusters, their branches draped in luminescent moss that pulsed in slow, rhythmic waves. When the breeze stirred, the moss dimmed and brightened in response, a forest-wide signal she could not read. Between the trunks, shapes flickered at the edge of vision, not quite creatures, not quite light, vanishing the moment she tried to focus .
She stopped. Squinted. One of the shapes lingered a heartbeat longer than the others, a suggestion of antlers and too many eyes, before it folded into the dark of the trees.
"Did you see that?"
"See what?" Nyx was watching her, not the forest. Their gaze held something careful, the look of someone cataloguing a change in a friend they had not expected.
"Never mind."
A sound reached her, faint and far off, somewhere between music and weeping. It had no fixed source, drifting now from the left, now from above, now from somewhere behind her sternum, as if the grove were trying out different doors to see which one she would open.
"Do you hear that?" she asked.
"Hear what?"
"The singing. Or the crying. I can't tell which."
Nyx tilted their head, listening. Their eyes widened by a fraction. "I hear neither. Which means either the grove is speaking only to you, or one of us is already changing."
Rory did not ask which possibility worried them more. The pale stone path curved ahead, winding deeper between the black-barked trees, and the wildflowers grew thicker as they walked, brushing her ankles with petals that left faint trails of light against her skin. Where the pollen touched her, it tingled, then warmed, then faded. She resisted the urge to brush it away.
The path opened into a second clearing, wider than the first, dominated by a single tree at its centre. It was enormous, its trunk wider than a car, its bark silver rather than black, and from its lowest branches hung a thousand small glass vials on threads of moon-coloured silk . Each vial held a flicker of something, ember, snowflake, a single drop of rain suspended mid-fall. As she watched, a breeze that touched nothing else set the vials chiming against one another, a delicate, sourceless music that matched the distant singing she had heard before.
"The memory tree." Nyx had drifted closer, their voice hushed. "I have heard rumours. I did not believe them."
"What is it?"
"A library. A prison. Depends on who you ask." They reached toward one of the vials, then stopped, fingers curling back. "Each one holds a moment someone could not bear to lose. Or a moment someone else could not bear to be remembered."
Rory stared up at the hanging forest of captured instants, and for a breath she thought she saw her own face in one of them, younger, laughing, reaching for someone whose features she could not quite resolve . The image flickered and was gone .
"Beautiful," she said, and the word felt inadequate.
"Beautiful is what the Fae call a warning." Isolde's voice arrived before she did.
Rory turned.
The Half-Fae seer emerged from between the silver tree's roots as if she had grown there, her silver hair catching light that had no visible source. She moved like smoke given form, her bare feet finding the moss without sound or weight , leaving no mark behind. Her pale lavender eyes fixed on Rory with the patient attention of someone who had watched this meeting unfold in dreams long before it happened in the world.
"You came." Isolde's voice carried the faint echo of wind chimes in a tongue Rory did not speak. "Though 'came' suggests you had a choice. The grove invited you. I merely translated."
"The invitation nearly burned a hole in my chest."
"Everything worth finding carries a little heat." Isolde tilted her head, a gesture too graceful to be entirely human. "You have questions. Three, by my count. The first is for me. The second will answer itself. The third..."
She smiled, and there was something ancient in it, something that remembered when the stones were young and the paths between worlds were wider than they were now.
"The third, you will wish you had never asked."
Rory's hand drifted to the pendant. It had stopped pulsing. Now it thrummed, steady as a second heartbeat, the warmth of it spreading down her arm, into the scar, into bone. She had not told Isolde about the scar. She had not told anyone.
"Isolde." Nyx had drifted to her other side, their whisper stripped of its usual play. "What is this place, truly ?"
"The Fae Grove. What remains of a door that was never meant to close."
"And what is on the other side of it?"
Isolde raised one slender hand and pointed past the memory tree, past the path, toward a shimmer in the air at the far edge of the clearing that Rory had dismissed as heat haze until now. It was not heat haze. It was a tear, a ripple, a thin place in the fabric of everything, through which something vast and amber-lit pressed against the membrane of the world.
"Hel," Isolde said. "Specifically, the Court of Gluttony, the realm of Prince Belphegor. And the door, little mortal, has been opening for some time."
The tear pulsed .
Rory watched, rooted, as through the gap a hand emerged, long-fingered and elegant, gripping the edge of reality as if peeling back a curtain to look upon a room it intended to devour . The fingers were the deep red of old wine, and where they touched the air, the wildflowers blackened and curled in a slow wave that crept toward the path.
"Run," Isolde said softly, and the word held no riddle at all . "Run now, and perhaps the path will remember kindness."
Rory did not run.
Instead, she reached for the silver chain at her throat, drew the Heartstone Pendant free, and felt it flare against her palm like a coal pulled fresh from a fire. The warmth became heat. The heat became light.
The hand recoiled, its fingers curling back through the tear with a sound like tearing silk .
For now.
Above the memory tree, one of the glass vials cracked. A single drop of suspended rain fell, and where it struck the silver bark, the wood began to bleed.