Metal rang against stone in the quiet night, coins plinging against statues and cobblestones. Vin smiled as she landed on all fours; then she bounded forward, jumping with pewter-enhanced muscles and Pulling one of the coins up into her hand.

Her opponent leaped backward, landing on the edge of a nearby fountain. Vin landed, then dropped her coin, using it to throw herself upward over the Watcher's head. He stooped, watching warily as she passed over him.

Vin caught of one of the bronze statues at the center of the fountain itself and pulled herself to a stop atop it. She crouched on the uneven footing, looking down at her opponent. He stood balanced on one foot at the edge of the fountain, quiet and black in the churning mists. There was a. . .challenge in his posture.

Can you catch me? he seemed to ask.

Vin whipped her daggers out and jumped free of the statue. She Pushed herself directly toward the Watcher, using the cool bronze as an anchor.

The Watcher used the statue as well, Pulling himself forward. He shot just beneath Vin, throwing up a wave of water, his incredible speed letting him skid like a stone across the fountain's still surface. As he jumped clear of the water, he Pushed himself away, shooting across the square.

Vin landed on the fountain lip, chill water spraying across her. She growled, jumping after the Watcher.

As he landed, he spun and whipped out his own daggers. She rolled beneath his first attack, then brought her daggers up in a two-handed double jab. The Watcher jumped quickly out of the way, his daggers sparkling and dropping beads of fountain water. He had a lithe power about him as he came to rest in a crouch. His body looked tense and sure. Capable.

Vin smiled again, breathing quickly. She hadn't felt like this since. . .since those nights so long ago, when she'd sparred with Kelsier. She remained in a crouch, waiting, watching the mist curl between her and her opponent. He was of medium height, had a wiry build, and he wore no mistcloak.

Why no cloak? Mistcloaks were the ubiquitous mark of her kind, a symbol of pride and security.

She was too far away to distinguish his face. She thought she saw a hint of a smile, however, as he jumped backward and Pushed against another statue. The chase began again.

Vin followed him through the city, flaring steel, landing on roofs and streets, Pushing herself in great arcing leaps. The two bounded through Luthadel like children on a playground—Vin trying to cut off her opponent, he cleverly managing to stay just a little bit ahead of her.

He was good. Far better than any Mistborn she had known or faced, save perhaps for Kelsier. However, she'd grown greatly in skill since she'd sparred with the Survivor. Could this newcomer be even better? The thought thrilled her. She'd always considered Kelsier a paradigm of Allomantic ability, and it was easy to forget that he'd had his powers for only a couple of years before the Collapse.

That's the same amount of time that I've been training, Vin realized as she landed in a small, cramped street. She frowned, crouching, remaining still. She'd seen the Watcher fall toward this street.

Narrow and poorly maintained, the street was practically an alleyway, lined on both sides by three- and four-story buildings. There was no motion—either the Watcher had slipped away or he was hiding nearby. She burned iron, but the iron-lines revealed no motion.

However, there was another way. . ..

Vin pretended to still be looking around, but she turned on her bronze, flaring it, trying to pierce the coppercloud that she thought might be close.

And there he was. Hiding in a room behind the mostly closed shutters of a derelict building. Now that she knew where to look, she saw the bit of metal he'd probably used to jump up to the second story, the latch he must have Pulled on to quickly close the shutters behind him. He'd probably scouted this street beforehand, always intending to lose her here.

Clever, Vin thought.

He couldn't have anticipated her ability to pierce copperclouds. But, attacking him now might give away that ability. Vin stood quietly, thinking of him crouching above, tensely waiting for her to move off.

She smiled. Reaching inside, she examined the duralumin reserve. There was a possible way to discover if burning it created some change in the way she looked to another Mistborn. The Watcher was likely burning most of his metals, trying to determine what her next move would be.

So, thinking herself incredibly clever, Vin burned the fourteenth metal.

A massive explosion sounded in her ears. Vin gasped, dropping to her knees in shock. Everything grew bright around her, as if some crack of energy had illuminated the entire street. And she felt cold; frigidly, stunningly cold.

She moaned, trying to make sense of the sound. It. . .it wasn't an explosion, but many explosions. A rhythmic thudding, like a drum pounding just beside her. Her heart-beat. And the breeze, loud as a howling wind. The scratchings of a dog searching for food. Someone snoring in their sleep. It was as if her hearing had been magnified a hundred times.

And then. . .nothing. Vin fell backward against the cobblestones, the sudden rush of light, coldness, and sound evaporating. A form moved in the shadows nearby, but she couldn't make it out—she couldn't see in the darkness anymore. Her tin was. . .

Gone, she realized, coming to. My entire store of tin has been burned away. I was. . .burning it, when I turned on the duralumin.

I burned them both at once. That's the secret. The duralumin had burned away all her tin in a single, massive burst. It had made her senses amazingly acute for a very short time, but had stolen away her entire reserve. And, looking, she could see that her bronze and her pewter—the other metals she'd been burning at the time—were gone as well. The onrush of sensory information had been so vast that she hadn't noticed the effects of the other two.

Think about it later, Vin told herself, shaking her head. She felt like she should be deafened and blinded, but she wasn't. She was just a bit stunned.

The dark form moved up beside her in the mists. She didn't have time to recover; she pushed herself to her feet, stumbling. The form, it was too short to be the Watcher. It was. . .

"Mistress, do you require assistance?"

Vin paused as OreSeur padded up to her, then sat on his haunches.

"You. . .managed to follow," Vin said.

"It was not easy, Mistress," OreSeur said flatly. "Do you require assistance?"

"What? No, no assistance." Vin shook her head, clearing her mind. "I guess that's one thing I didn't think of by making you a dog. You can't carry metals for me now."

The kandra cocked his head, then padded over into an alleyway. He returned a moment later with something in his mouth. Her belt.

He dropped it by her feet, then returned to his waiting position. Vin picked up the belt, pulling off one of her extra metal vials. "Thank you," she said slowly. "That is very. . .thoughtful of you."

"I fulfill my Contract, Mistress," the kandra said. "Nothing more."

Well, this is more than you've ever done before, she thought, downing a vial and feeling her reserves return. She burned tin, restoring her night vision, releasing a veil of tension from her mind; since she'd discovered her powers, she'd never had to go out at night in complete darkness.

The shutters of the Watcher's room were open; he had apparently fled during her fit. Vin sighed.

"Mistress!" OreSeur snapped.

Vin spun. A man landed quietly behind her. He looked. . .familiar, for some reason. He had a lean face—topped with dark hair—and his head was cocked slightly in confusion. She could see the question in his eyes. Why had she fallen down?