Loki had been browsing.
That was the word he'd settled on, centuries ago. Browsing. Like a scholar leafing through a library, pulling down books at random, reading a chapter, putting them back. The infinite branches of Yggdrasil spread before him, and he drifted among them with the idle curiosity of a god who had run out of things to be curious about.
Most of the new branches were variations on themes he'd already seen. Worlds of heroes and villains. Worlds of science and sorcery. Worlds that thought they were unique and were, in their particulars, but not in their patterns. The patterns never changed. Only the costumes.
Then he found the spirit world.
Not a branch like the others. This one pulsed. It breathed. It was saturated with something he hadn't encountered before—a native magic that wasn't sorcery, wasn't Asgardian, wasn't derived from any cosmic force he recognized. It was spiritual. A dimension layered over the physical world like gauze over a wound. Inhabited. Alive.
He leaned forward. The throne adjusted.
"Interesting," he murmured.
---
He entered without a vessel.
No mortal body this time. No shopkeeper or prisoner or convenient bystander. The spirit world was accessible to beings of sufficient spiritual weight, and Loki—Anchor of Yggdrasil, God of Stories, godbrother of the Endless—qualified. He slipped into that layered dimension like a hand into warm water.
The spirit world was a chaos of beauty. Forests of glowing fungi. Mountains that floated. Rivers that flowed in spirals. Spirits drifted everywhere—small ones, curious ones, ancient ones that turned their vast attention toward him and then away, unsettled without knowing why.
He walked among them, unseen when he wished, visible when it amused him. He asked questions of the spirits that would speak. They told him of Raava and Vaatu. Of the Avatar. Of a world where mortals bent the elements to their will through spiritual inheritance.
The Avatar. A mortal who wielded all four elements. A bridge between worlds. A cycle of reincarnation stretching back ten thousand years.
Loki's attention sharpened.
"Tell me more," he said to a knowledge spirit that had been foolish enough to answer his first question. "Tell me about Vaatu."
---
The Tree of Time stood in a valley that had no name.
It was vast. Ancient. Its roots delved into the bedrock of the spirit world itself. And bound within it—visible through the translucent bark like a shadow trapped in amber—was Vaatu.
The spirit of darkness. The embodiment of chaos. Raava's opposite. Sealed here by the first Avatar ten millennia ago, and waiting. Always waiting.
Loki approached the tree. The spirits that normally guarded this place—lesser beings, servants of balance—fled at his approach. They didn't know what he was. They only knew he didn't belong.
Vaatu's voice came from everywhere and nowhere. It was a voice accustomed to power. A voice that had spent ten thousand years in darkness, dreaming of freedom, rehearsing the words that would finally open its cage.
"Another spirit? No. You're not just a normal spirit—that much I can sense. What are you? Come closer, stranger. Help me be released from this prison, and I shall give you what your heart desires."
"Stranger." Loki considered the word, then shrugged. "Fair enough. I am indeed a stranger here."
"Closer," Vaatu urged. "The seal is old. Weak. A being of your strength could erode it. Just a touch. Just a crack. I can do the rest."
Loki took another step. Then another. He stood before the tree, close enough to see the darkness writhing within the translucent bark. Vaatu was vast—a kite-shaped shadow, pulsing with ancient malevolence.
"You've been here a long time," Loki observed.
"Ten thousand years. Trapped by Raava and her mortal puppet. The Avatar." Vaatu's voice dripped venom on the word. "But you—you're different. Not bound by her rules. Not part of her design. You could free me. And I could make it worth your while."
"Could you?"
"Power. Chaos. Freedom. Whatever you desire. I am Vaatu. I am the darkness that existed before the light. I have seen empires rise and fall. I have shaped the destiny of worlds. Release me, and I will share that power with you."
Loki tilted his head. "You talk a great deal for someone who's been alone for ten thousand years."
"Alone, yes. But not ignorant. I felt you enter this world. Something foreign. Something powerful. A spirit unlike any I've encountered. You could be my instrument—my hands in the world beyond this cage. Together, we could—"
"You misunderstand," Loki said.
Vaatu paused. "Misunderstand what?"
"I'm not here to bargain. I'm here to browse."
And he reached into the tree.
Not with his hand. With his essence. The green fire that was his true self, the power that sustained Yggdrasil, the hunger that had driven him since he was a child in Asgard watching his brother receive all the love he craved.
Vaatu screamed.
"What are you doing?! What—stop! STOP!"
"Ten thousand years," Loki murmured, as the darkness tore beneath his grip. "And you never once considered that something might come along that was worse than you."
The screaming continued. Then it stopped.
And Vaatu was no more.
---
The devouring was not gentle.
Loki tore through Vaatu's essence like a wolf through a carcass. Memories flooded into him—ten thousand years of imprisonment, ancient wars with Raava, the birth of the Avatar, the sealing of the gates. Knowledge of spiritual mechanics. The principles of elemental fusion. The architecture of the spirit world itself.
And with the memories came the shape of Vaatu. The pattern. The template. The thing that made Vaatu what he was.
When it was done, Vaatu was gone. Not imprisoned. Not dormant. Gone.
The Tree of Time was empty.
And Loki felt the spirit world scream.
---
The imbalance was immediate.
Vaatu and Raava were two halves of a whole. Darkness and light. Chaos and order. Yin and yang. Without Vaatu, the spirit world lurched. The sky dimmed. The spirits wailed. Even the physical world—distant, separated by the sealed gates—felt the tremor.
Loki understood the problem at once. He'd seen this before, in other realities. Destruction without creation. Death without life. A system designed for duality, suddenly amputated.
If he left now, this world would collapse. Not quickly. Slowly. Painfully. The Avatar cycle would destabilize. The spirit world would wither. The physical world would follow.
He hadn't come here to destroy. He'd come here to browse.
"Fine," he muttered. "Let's fix this."
---
The creation was an act of improvisation.
Loki had never created a spirit before. But he'd devoured one, and the memories were fresh, and his knowledge in sorcery—centuries of magical understanding from a civilization that built cities of gold—was more than adequate to the task.
He took the template of Vaatu. The pattern. The shape. He hollowed it out, stripping away everything that had been the original spirit—the will, the hunger, the ancient malice. What remained was an empty vessel. A shell patterned after darkness but containing nothing.
He named it Taolu.
Then he filled it with a fragment of his own consciousness. A whisper. A thread. Enough to animate the construct, to give it purpose, to make it *his*.
When it was done, a new spirit hung in the air before him. It looked like Vaatu. It felt like Vaatu. It would serve the same cosmic function as Vaatu. But it was not Vaatu.
It was Loki's creature. Loki's tool. Loki's *self*, in a form this world could understand.
The spirit world steadied. The balance—shaken but not broken—began to restore itself. Taolu wasn't a perfect replacement. But it would hold.
Loki lingered for a moment, studying his creation. Then he withdrew. His main consciousness returned to the throne, to Yggdrasil, to the infinite branches and the silent void. The fragment remained. Taolu remained. The connection between them was a thread of green fire stretching across realities.
Now Taolu needed a vessel.
It drifted through the spirit world, scanning the physical plane beyond the veil. It needed a bender. Someone with native access to the elemental system. Someone weak. Someone close. Someone easy to occupy.
It found her in a Fire Nation prison.
---
Her name was Hama.
Not that it mattered. She was a waterbender from the Southern Tribe, captured during a raid, caged like an animal, left to rot. Her body was strong—years of labor had kept it lean. Her bending was intact, though suppressed by the prison's design. Her mind was a storm of pain and rage and desperate, hopeless hope.
She was close. She was broken. She was perfect.
Taolu latched.
The connection snapped into place—a thread of green fire bridging spirit and flesh. Through Taolu, Loki's consciousness flowed. Not a whisper this time. Not a fragment observing from within. A full override. Hama's consciousness—her memories, her pain, her desperate hope—simply stopped. Erased. Extinguished.
The body slumped in its chains. The heart kept beating. The lungs kept breathing.
Then the body straightened. The eyes opened.
They were not Hama's eyes anymore.
"Interesting," she said, testing the voice. It was rough from disuse. Female. Southern Water Tribe accent. Useful.
She flexed the fingers. Rolled the shoulders. Took stock of the body's condition. Malnourished. Weakened. But the bending was there—a pulse of water in the blood, waiting to be used.
The full moon was three nights away. The guards were careless. The prison was designed for mortals.
She was not a mortal.
---
Escape was trivial.
Bloodbending came naturally. The human body was mostly water, and water was her native element in this form. The guards never knew what hit them. She walked out of the prison three nights later, under the full moon, leaving behind a trail of corpses arranged to look like an animal attack. No witnesses. No survivors.
She stopped at the edge of the forest and looked back at the prison that had caged this body for years. Hama's memories supplied the details—the torture, the isolation, the slow erosion of hope. She examined these memories with clinical detachment. Useful context. Nothing more.
Then she turned and walked into the trees.
The night was cold. The body was weak. But the bending was there—a pulse of water in the blood, waiting to be used. Water was hers by birthright. Hama had been born to it, trained in it, mastered it in the frozen South long before the Fire Nation came.
But water was not enough.
She paused in a clearing, moonlight filtering through the branches. Taolu stirred within her, restless. It had Vaatu's shape but none of his memories of wielding the elements. That knowledge belonged to Raava alone. The Avatar could bend all four because Raava held them. Taolu held nothing but potential.
She would have to fill it herself.
Firebenders were everywhere in this nation. Soldiers. Guards. Civilians. That would be the first hunt. Earthbenders were imprisoned, scattered, hunted. That would be the second. And airbenders—
There were no airbenders. The Avatar was frozen somewhere in the ocean, spiritually present but physically unreachable. The gates were sealed. Only Raava's Avatar held the keys to unlock them. Without an airbender to plunder, without the gates open, air was impossible.
"Two out of three," she murmured. "It will have to do."
She walked deeper into the forest. The prison faded behind her. The hunt stretched before her.
And somewhere on the throne at the end of time, Loki watched through her eyes and waited.