A crack sounded behind her. Vin cried out, her tin-enhanced ears overreacting to the sudden sound. Pain shot through her head, and she raised hands to her ears. She'd forgotten the Smoker, who stood holding two lengths of wood, crafted to make sharp noises when pounded together.

Movements and reactions, actions and consequences—these were the essence of Allomancy. Tin made her eyes pierce the mists—giving her an edge over the assassins. However, the tin also made her ears extremely acute. The Smoker raised his sticks again. Vin growled and yanked a handful of coins off the cobblestones, then shot them at the Smoker. The Lurcher, of course, Pulled them toward him instead. They hit the shield and bounced free. And as they sprayed into the air, Vin carefully Pushed one so it fell behind him.

The man lowered his shield, unaware of the coin Vin had manipulated. Vin Pulled, whipping the single coin directly toward her—and into the back of the Lurcher's chest. He fell without a sound.

Four.

All fell still. The Thugs running toward her drew to a stop, and the Smoker lowered his sticks. They had no Coinshots and no Lurchers—nobody that could Push or Pull metal—and Vin stood amid a field of coins. If she used them, even the Thugs would fall quickly. All she had to do was—

Another coin shot through the air, fired from the Watcher's rooftop. Vin cursed, ducking. The coin, however, didn't strike her. It took the stick-holding Smoker directly in the forehead. The man toppled backward, dead.

What? Vin thought, staring at the dead man.

The Thugs charged, but Vin retreated, frowning. Why kill the Smoker? He wasn't a threat anymore.

Unless. . .

Vin extinguished her copper, then burned bronze, the metal that let her sense when other Allomancers were using powers nearby. She couldn't feel the Thugs burning pewter. They were still being Smoked, their Allomancy hidden.

Someone else was burning copper.

Suddenly, it all made sense. It made sense that the group would risk attacking a full Mistborn. It made sense that the Watcher had fired at the Coinshot. It made sense that he had killed the Smoker.

Vin was in grave danger.

She only had a moment to make her decision. She did so on a hunch, but she'd grown up on the streets, a thief and a scam artist. Hunches felt more natural to her than logic ever would.

"OreSeur!" she yelled. "Go for the palace!"

It was a code, of course. Vin jumped back, momentarily ignoring the Thugs as her servant ducked out of an alleyway. He pulled something off his belt and whipped it toward Vin: a small glass vial, the kind that Allomancers used to store metal shavings. Vin quickly Pulled the vial to her hand. A short distance away, the second Coinshot—who had lain there, as if dead—now cursed and scrambled to his feet.

Vin spun, drinking the vial with a quick gulp. It contained only a single bead of metal. Atium. She couldn't risk carrying it on her own body—couldn't risk having it Pulled away from her during a fight. She'd ordered OreSeur to remain close this night, ready to give her the vial in an emergency.

The "Coinshot" pulled a hidden glass dagger from his waist, charging at Vin ahead of the Thugs, who were getting close. Vin paused for just a moment—regretting her decision, but seeing its inevitability.

The men had hidden a Mistborn among their numbers. A Mistborn like Vin, a person who could burn all ten metals. A Mistborn who had been waiting for the right moment to strike at her, to catch her unprepared.

He would have atium, and there was only one way to fight someone who had atium. It was the ultimate Allomantic metal, usable only by full Mistborn, and it could easily decide the fate of a battle. Each bead was worth a fortune—but what good was a fortune if she died?

Vin burned her atium.

The world around her seemed to change. Every moving object—swinging shutters, blowing ash, attacking Thugs, even trails of mist—shot out a translucent replica of itself. The replicas moved just in front of their real counterparts, showing Vin exactly what would happen a few moments in the future.

Only the Mistborn was immune. Rather than shooting out a single atium shadow, he released dozens—the sign that he was burning atium. He paused just briefly. Vin's own body would have just exploded with dozens of confusing atium shadows. Now that she could see the future, she could see what he was going to do. That, in turn, changed what she was going to do. That changed what he was going to do. And so, like the reflections in two mirrors facing each other, the possibilities continued into infinity. Neither had an advantage.

Though their Mistborn paused, the four unfortunate Thugs continued to charge, having no way to know that Vin burned atium. Vin turned, standing beside the body of the fallen Smoker. With one foot, she kicked the soundsticks into the air.

A Thug arrived, swinging. His diaphanous atium shadow of a staff blow passed through her body. Vin twisted, ducking to the side, and could feel the real staff pass over her ear. The maneuver seemed easy within the aura of atium.

She snatched one of the soundsticks from the air, then slammed it up into the Thug's neck. She spun, catching the other soundstick, then twisted back and cracked it against the man's skull. He fell forward, groaning, and Vin spun again, easily dodging between two more staves.

She smashed the noise sticks against the sides of a second Thug's head. They shattered—ringing with a hollow sound like that of a musician's beat—as the Thug's skull cracked.

He fell, and did not move again. Vin kicked his staff into the air, then dropped the broken soundsticks and caught it. She spun, twisting the staff and tripping both remaining Thugs at once. In a fluid motion, she delivered two swift—yet powerful—blows to their faces.

She fell to a crouch as the men died, holding the staff in one hand, her other hand resting against the mist-wetted cobbles. The Mistborn held back, and she could see uncertainty in his eyes. Power didn't necessarily mean competence, and his two best advantages—surprise and atium—had been negated.

He turned, Pulling a group of coins up off the ground, then shot them. Not toward Vin—but toward OreSeur, who still stood in the mouth of an alleyway. The Mistborn obviously hoped that Vin's concern for her servant would draw her attention away, perhaps letting him escape.

He was wrong.

Vin ignored the coins, dashing forward. Even as OreSeur cried out in pain—a dozen coins piercing his skin—Vin threw her staff at the Mistborn's head. Once it left her fingers, however, its atium shadow became firm and singular.

The Mistborn assassin ducked, dodging perfectly. The move distracted him long enough for her to close the distance, however. She needed to attack quickly; the atium bead she'd swallowed had been small. It would burn out quickly. And, once it was gone, she'd be exposed. Her opponent would have total power over her. He—

Her terrified opponent raised his dagger. At that moment, his atium ran out.

Vin's predatory instincts reacted instantly, and she swung a fist. He raised an arm to block her blow, but she saw it coming, and she changed the direction of her attack. The blow took him square in the face. Then, with deft fingers, she snatched his glass dagger before it could fall and shatter. She stood and swung it through her opponent's neck.

He fell quietly.

Vin stood, breathing heavily, the group of assassins dead around her. For just a moment, she felt overwhelming power. With atium, she was invincible. She could dodge any blow, kill any enemy.

Her atium ran out.

Suddenly, everything seemed to grow dull. The pain in her side returned to her mind, and she coughed, groaning. She'd have bruises—large ones. Perhaps some cracked ribs.