Opening his eyes to find a colossal bat standing before him had Grey screaming in panic.
He found himself staring upward, mouth slightly open, neck aching from the angle. For a long time his mind simply refused to process what his eyes were sending it.
The creature that stood where Kaz had fallen was not merely large. It was not merely enormous. It was a thing of such scale that language felt inadequate for it.
More than two hundred metres tall, its head nearly touching the dark endless-looking ceiling of the chamber. Its wings were tucked at the moment but even folded they pressed against the walls of the cave like storm clouds that had run out of sky.
He tried to measure it the way he measured trees in the forest back home. Ten tall evergreens stacked on top of each other. Twenty huts piled one above the next. The highest cliff near Seaside doubled and then doubled again.
Still not enough.
Its fur was dark as midnight water, streaked with silver scars that shone like lightning trapped under skin. Each strand of fur was thick as rope. The torn edges of its wings looked like shredded banners after a long war, pierced through by ancient wounds that still glowed faintly gold where the chains had dug in.
When it breathed, wind rolled across the cavern floor and sent loose dust skittering like frightened insects.
Grey backed away several steps on pure instinct, his legs doing the thinking while his brain was still catching up. Having been in a near-unconscious state from spirit energy depletion he had not been prepared for this.
He was at least grateful it was not the face he had woken up to directly. He might have passed out from terror alone.
As it was, his legs were shaking.
The giant bat blinked slowly, careful, as though afraid the movement might startle the boy further.
"It seems my form has scared you... Again." He heard the Bat chuckle.
Grey managed to calm down. "Sorry. I just wasn't expecting you to be this big."
Then the body began to shrink.
There were no dramatic flashes of light, no thunderclap of transformation. Just folding inward. Like a mountain deciding to sit down. Fur receded. Bones drew tight. Wings pulled close.
The air bent strangely around the edges of it as the colossal shape compressed itself, smaller and smaller, until a tall slender figure stood where the titan had been.
A man.
Grey stared at him.
He was beautiful in a quiet, unsettling way. Long black hair fell past his shoulders, streaked faintly with silver like starlight caught in ink. His eyes were the same deep red as before but softer now, carrying something that might have been amusement.
His face was pale and sharp-boned, elegant, like something carved from moonlight by something that had taken its time. The ragged remnants of his wings hung behind him as a cloak of dark mist that faded with each breath until it was gone.
Grey blinked hard. "Kaz?"
The man smiled faintly. "You saw the worst of me first. That's not very polite, little human."
Grey laughed, slightly hysterical. "You were two hundred metres tall. I think politeness died somewhere in the middle of that."
Kaz tilted his head. "Only two hundred? I'm losing my touch."
Grey stared at him for another moment and then laughed properly, the tension of everything that had happened snapping cleanly and completely.
After all of it, the horde and the ghost forest and the chasm and the tentacles and the Chain Spirit, he could breathe again.
They talked for a while about nothing in particular and everything important.
Kaz spoke softly, his voice still rough from centuries of silence, and Grey asked question, forgetting half of them before they were answered and asking different ones instead.
They stood in the ruined cavern with dust drifting down like slow snow and talked in the easy way that shouldn't have been possible between a twelve year old orphan from a fishing village and an ancient imprisoned Titan, and yet somehow was.
Then the mountain began to die.
A crack ran through the stone ceiling like thunder with nowhere to go. The crystals dimmed all at once. The ground trembled, deep and rolling, and dust poured from invisible seams in the rock. Grey jumped back as a slab of stone shattered on the exact spot he had been standing.
Kaz looked upward with calm consideration. "We should go."
"Yep."
They hurriedly ran outside.
They burst out of the cavern into cold open air just as the peak behind them folded in on itself.
There was no explosion, no dramatic crash. It simply crumbled into grey ash and blew away on a wind that had not existed a moment earlier. Within seconds the mountain was gone, leaving only empty sky and the distant line of trees.
Grey stopped dead.
"My statues!" he said.
Kaz looked at him sideways. "Your statues?"
"The bat carvings. On the outside." Grey gestured at the empty air where the mountain had been. "They were incredible. I was going to name them."
He hadn't planned any of this before the words came out but seeing the mountain gone, that level of craftsmanship erased like it had never existed, genuinely hurt more than he would have predicted. "They had personality."
Kaz stared at him for a long moment.
Then he laughed. A real laugh, surprised out of him, warm and unguarded, the sound of something that hadn't happened in a very long time and was slightly rusty from disuse. "You are grieving decorative rocks after freeing an ancient prisoner."
"They were nice rocks."
"You can make new ones."
"They won't be the same." Grey muttered.
Kaz sighed. "Alright. I'll make them for you."
Grey stopped whining immediately and smiled. Widely.
A voice drifted from behind them, soft as wind through leaves. "You humans form attachments to the strangest things."
Grey spun around.
A woman stood where no one had been a moment ago, veiled in drifting mist, green hair falling to her waist like woven vines. Her eyes were the colour of fresh leaves after rain, bright and calm. She wore white robes embroidered with gold thread that moved faintly in patterns that looked like roots beneath cloth.
Kaz's expression softened. "Lin."
The woman stepped forward slowly, as though afraid he might dissolve if she moved too fast.
"Finally," she said. "I thought this day would never come."
"It is happening before your very eyes," Kaz replied, his voice lower than usual.
Grey felt distinctly like he was standing in the middle of something private.
He scratched the back of his head. "Uh...Hi. I'm Grey."
The woman's gaze moved to him.
Her presence washed over Grey like a wave. It wasn't hostile, just enormous, the way the presence of something very old and very strong is enormous even when it is being careful.
He held his ground and tried to look like someone who had not spent the last several hours being nearly killed by everything in the Heartlands.
"You freed him," she said.
"I think so, yeah." Grey muttered
She studied him for a long moment. Then she inclined her head in a slow and deliberate bow.
"Thank you."
Grey nearly stepped backward. "W-What? No, I just-"
"Accept it," Kaz said, with the tone of someone who has known this woman for a very long time. "She does not thank easily."
Lin straightened. Her expression sharpened underneath the warmth.
"The divine will come," she said. "Breaking the covenant will not go unanswered."
Grey swallowed. "Are we in trouble?"
Kaz looked at him steadily. "Yes."
Grey exhaled. "Of course we are."
Lin looked between them. "The boy must grow stronger. Quickly."
Grey frowned. "Why me specifically?"
"Well you freed me and because you are my contractor now," Kaz said. "My partner. And the only human alive who knows the truth of the Heart's Abyss."
The chill that moved down Grey's spine settled somewhere in his chest and stayed there.
He looked at Lin. "How do you two know each other?"
She smiled faintly. "Neighbours of misfortune."
The realisation arrived quietly. "You're imprisoned too?"
She nodded once with a smile. There was no bitterness or sadness. Just the simple acceptance of someone who had been sitting with the same reality for long enough that it no longer required decoration.
Grey looked at her for a moment. Then at the empty sky where the mountain had been. Then back at her.
"I'll come back," he said. "When I'm stronger. I'll free you too."
He meant it completely, even without knowing how, even without knowing if returning to the Heartlands after bonding was something anyone had ever done. He would figure the details out later.
Lin looked at him for a long moment. Something small and quiet moved through her expression that she didn't appear to have intended to show.
"Then I will wait," she said softly.