Mistborn #02 The Well of Ascension

Sazed had gone south. The direction in which Kelsier claimed to have discovered the Eleventh Metal.
    Are there rumors about this metal, too ? Vin wondered, rubbing the duralumin. Ones that might tell me what it does ?
    Each of the other metals produced an immediate, visible effect; only copper, with its ability to create a cloud that masked an Allomancer's powers from others, didn't have an obvious sensory clue to its purpose. Perhaps duralumin was similar. Could its effect be noticed only by another Allomancer, one trying to use his or her powers on Vin? It was the opposite of aluminum, which made metals disappear. Did that mean duralumin would make other metals last longer?
    Movement.
    Vin just barely caught the hint of shadowed motion. At first, a primal bit of terror rose in her: Was it the misty form, the ghost in the darkness she had seen the night before?
    You were just seeing things , she told herself forcefully. You were too tired . And, in truth, the glimmer of motion proved too dark—too real —to be the same ghostly image.
    It was him.
    He stood atop one of the watchtowers—not crouching, not even bothering to hide. Was he arrogant or foolish, this unknown Mistborn? Vin smiled, her apprehension turning to excitement. She prepared her metals, checking her reserves. Everything was ready.
    Tonight I catch you, my friend .
    Vin spun, throwing out a spray of coins. Either the Mistborn knew he'd been spotted, or he was ready for an attack, for he easily dodged. OreSeur hopped to his feet, spinning, and Vin whipped her belt free, dropping her metals.
    "Follow if you can," she whispered to the kandra, then sprang into the darkness after her prey.
    The Watcher shot away, bounding through the night. Vin had little experience chasing another Mistborn; her only real chance to practice had come during Kelsier's training sessions. She soon found herself struggling to keep up with the Watcher, and she felt a stab of guilt for what she had done to OreSeur earlier. She was learning firsthand how difficult it was to follow a determined Mistborn through the mists. And she didn't have the advantage of a dog's sense of smell.
    She did, however, have tin. It made the night clearer and enhanced her hearing. With it, she managed to follow the Watcher as he moved toward the center of the city. Eventually, he let himself drop down toward one of the central fountain squares. Vin fell as well, hitting the slick cobblestones with a flare of pewter, then dodging to the side as he threw out a handful of coins.
    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