Chapter 22: A Strike to the Heart

Arthur slipped behind the thick stone pillar the moment the door swung open.

He did not breathe until the heavy echo of it faded.

The treasury chamber was vast and silent in a way that felt unnatural, as if the air itself was holding its breath. The ceiling was lost in shadow high above. The walls were lined with pale stone and cut by thin veins of blue runes that pulsed faintly, casting just enough cold light to see by. Their light did not flicker. It beat, slow and steady, like a sleeping heart. The floor was polished black marble that reflected those runes, making it feel as if he were standing over a deep, glowing lake.

At the far end stood the main vault.

It wasn’t a door so much as a wall. A single slab of black crystal, ten feet tall, set flush into the stone. Its surface was covered in ancient protection runes, layered over each other for centuries, each one humming with a different frequency. Even from thirty feet away, Arthur could feel the pressure of them against his skin.

The two cloaked figures had already moved.

They did not waste time looking around. They knew exactly where to go. Their boots made no sound on the marble. One tall, one slightly shorter, both in heavy grey cloaks that swallowed the blue light.

The taller one stopped directly before the lock - a single, keyless indentation in the crystal - and pressed his palm against it. With his other hand, he summoned his Grimoire.

It appeared with a soft crack of displaced air. A thick book bound in dark leather, its pages edged in faint silver. It opened on its own, pages flipping until it found what it wanted. A complex magic circle began to form in the air above the keyhole, glowing emerald and spinning slowly. Lines within lines, symbols rotating counter to each other. The air around it smelled sharply of ozone.

The second figure moved to the opposite side of the door, his own Grimoire opening with a soft chime. His circle was different. Where the first was sharp and angular, this one was fluid, made of concentric rings filled with flowing script that dripped like ink. It cast a pale violet light across his hood.

Arthur’s hand tightened on the hilt of his training blade.

It was a plain thing, unadorned steel, the edge dulled from weeks of drills. It was not meant to kill. But it was all he had.

He kept his breathing shallow, his body pressed flat against the cold pillar. The stone bit into his back even through his tunic. He could feel his own pulse in his throat. Inside his chest, his large mana pool hummed quietly, a deep reservoir of heat and pressure that he had only recently learned to feel. It was not refined. It was raw and vast and eager.

In his mind, unbidden, came the memory.

The training yard at noon. Talia moving like she was made of wind. Her silver hair whipping around her as she invoked it - Heavenfall Cyclone. The air around her had shrieked. She had gathered everything into a single point at the tip of her spear and said the name of the final strike like a prayer.

Heart Piercer.

One devastating, absolute thrust. No feint. No flourish. Just truth, delivered at a speed the eye could barely follow. She had told him afterward, her voice calm even as sweat dripped from her chin, "Power means nothing if you hesitate. You put everything into the point that matters and you do not stop until it is through."

He would wait for the perfect moment.

The first figure finished his circle and spoke a quiet incantation. The words were old, guttural. The lock on the vault door began to glow, the ancient protection runes fighting back, flaring red where the emerald light touched them. The crystal itself groaned, a low sound that vibrated through the floor.

The second figure mirrored him, his violet circle spinning faster. The mechanism was starting to give. A thin seam of golden light appeared around the edge of the black slab.

Both intruders were completely focused now. Arthur could see it in the set of their shoulders. Their work was succeeding. Happy, greedy expressions were already forming on the parts of their faces he could see beneath their hoods. They were thinking about what was inside.

Arthur’s eyes narrowed. The blue runes reflected in them.

Now.

He exploded out from behind the pillar.

He did not shout. He did not give them a chance to turn fully. All the coiled tension in his legs released at once. The distance between the pillar and the vault vanished in two heartbeats. The training blade, which had felt heavy a second ago, was already halfway through its arc, his entire body behind it. He poured every drop of mana he had into his arms, into his legs, into that single, terrible point.

He aimed straight for the heart of the first man, the one who had opened the emerald circle.

It was Talia’s strike. Exactly as she had shown him.

The blade struck true.

For a half second there was resistance, the thick cloak, then muscle. Then the blade went through flesh, bone, and heart like it was cutting through paper. The force of his charge carried him forward, driving the steel clean through the man’s back until the crossguard hit his ribs.

The intruder’s eyes widened in absolute shock. The incantation died in his throat with a wet gasp. Blood instantly bloomed across his grey robe, black in the blue light. His body jerked once, violently, his hands clawing uselessly at the blade in his chest. His Grimoire snapped shut and fell to the floor with a heavy thud, the emerald circle above it shattering into sparks.

He slid down the vault door as Arthur pulled back, leaving a thick, dark trail on the perfect black crystal.

Arthur did not stop. He could not stop. The momentum was everything.

He twisted the blade free - the sound it made made his stomach turn - and spun on his heel, using the dead man’s falling weight to pivot. He lunged at the second man with the full, savage momentum of his charge. The blade was aimed at the heart again, exactly the same killing line. Same footwork. Same breathless commitment.

The second intruder’s eyes widened. He had been frozen for a second too long, watching his partner die. Now he tried to dodge, throwing his body to the side, his own Grimoire flaring in panic.

He was almost too slow.

The blade missed the center of his chest by a fraction of an inch. Instead it carved a deep, ugly wound across his shoulder, slicing through cloak and skin and down to the bone. The man screamed, a raw, broken sound, and stumbled backward, clutching his bleeding shoulder, his face contorted in pure terror. His violet circle sputtered and died.

Arthur’s vision tunneled.

The cost hit him all at once. He had put everything into those two strikes. Every ounce of mana in that large, untrained pool had been burned in one furious expenditure. Now it felt like an empty well inside him, a hollow, aching void. A cold sickness washed through him. His face had gone completely pale, the color draining away so fast he felt dizzy. Sweat poured down his temples, stinging his eyes. His legs, which had been so solid, felt like they might give out, trembling uncontrollably. The training blade suddenly weighed a hundred pounds in his hand.

He staggered, gasping, trying to raise the blade again.

The second intruder recovered. The terror in his eyes was replaced by something worse. A sneer twisted his mouth as he saw Arthur swaying.

"You little rat," he hissed, his voice thick with pain and rage. "You little academy rat."

He raised his good hand, and the air around it crackled. A small dagger of compressed mana, dense and humming and sharp enough to punch through plate armor, formed between his fingers. The light from it was ugly and white. He was going to drive it straight into Arthur’s heart.

Arthur raised his blade in a weak, shaking defense. His arms would not lock. He could not gather any mana. He already knew it was not going to be enough. For a strange, clear second, he accepted that this was the end, right here on the cold treasury floor.

The dagger never reached him.

A single ice arrow screamed through the air.

It came from the darkness behind the pillars, from the doorway Arthur had entered through. It moved so fast it left a white trail in the air, frosting the moisture as it passed. It struck the intruder’s head with perfect, impossible precision.

It did not just pierce. It exploded on impact.

The intruder’s entire skull shattered with a sharp crack. Blood and bone sprayed across the black stone in a wet mist, steaming slightly in the cold air. The body dropped instantly, boneless, the half-formed mana dagger clattering uselessly to the floor and dissipating into nothing.

Silence crashed back into the chamber.

Arthur stood frozen, blade still raised, chest heaving. The blue runes kept pulsing. The black crystal vault door was smeared with blood. Two bodies lay at its foot.

From the shadows by the entrance, slow footsteps echoed on the marble, coming closer.