Mistborn #03 The Hero of Ages

same time. That might be helpful." Before, they'd thought it took a Mistborn burning duralumin to get control of koloss.
    "It doesn't matter," Vin said, pointing at the other side of the plate. "We have that ."
    The other half of the plate contained a map, carved into steel, just like the maps they had found in the other three storage caverns. It depicted the Final Empire, divided into dominances. Luthadel was a square at the center. An "X" to the east marked the main thing they'd come looking for: the location of the final cavern.
    There were five, they thought. They'd found the first one beneath Luthadel, near the Well of Ascension. It had given the location of the second, to the east. The third had been in Urteau—Vin had been able to sneak into that one, but they hadn't managed to recover the food yet. That one had led them here, to the south.
    Each map had two numbers on it—a five and a lower number. Luthadel had been number one. This one was number four.
    "That's it," Vin said, running her fingers along the carved inscriptions on the plate. "In the Western Dominance, as you guessed. Somewhere near Chardees?"
    "Fadrex City," Elend said.
    "Cett's home?"
    Elend nodded. He knew far more about geography than she.
    "That's the place, then," Vin said. "The one where it is."
    Elend met her eyes, and she knew he understood her. The caches had grown progressively larger and more valuable. Each one had a specialized aspect to it as well—the first had contained weapons in addition to its other supplies, while the second had contained large amounts of lumber. As they'd investigated each successive cache, they'd grown more and more excited about what the last one might contain. Something spectacular, surely. Perhaps even it .
    The Lord Ruler's atium cache.
    It was the most valuable treasure in the Final Empire. Despite years of searching, nobody had ever located it. Some said it didn't even exist. But, Vin felt that it had to. Despite a thousand years of controlling the sole mine that produced the extremely rare metal, he had allowed only a small portion of atium to enter the economy. Nobody knew what the Lord Ruler had done with the greater portion he had kept to himself for all those centuries.
    "Now, don't get too excited," Elend said. "We have no proof that we'll find the atium in that final cavern."
    "It has to be there," Vin said. "It makes sense. Where else would the Lord Ruler store his atium?"
    "If I could answer that, we'd have found it."
    Vin shook her head. "He put it somewhere safe, but somewhere where it would eventually be found. He left these maps as clues to his followers, should he—somehow—be defeated. He didn't want an enemy who captured one of the caverns to be able to find them all instantly."
    A trail of clues that led to one, final cache. The most important one. It made sense. It had to. Elend didn't look convinced. He rubbed his bearded chin, studying the reflective plate in their lantern light. "Even if we find it," he said, "I don't know that it will help that much. What good is money to us now?"
    "It's more than money," she said. "It's power. A weapon we can use to fight."
    "Fight the mists?" he asked.
    Vin fell silent. "Perhaps not," she finally said. "But the koloss, and the other armies. With that atium, your empire becomes secure. . . . Plus, atium is part of all this, Elend. It's only valuable because of Allomancy—but Allomancy didn't exist until the Ascension."
    "Another unanswered question," Elend said. "Why did that nugget of metal I ingested make me Mistborn? Where did it come from? Why was it placed at the Well of Ascension, and by whom? Why was there only one left, and what happened to the others?"
    "Maybe we'll find the answer once we take Fadrex," Vin said.
    Elend nodded. She could tell he considered the information contained in the caches the most important reason to track them down, followed closely by the supplies. To him, the possibility of finding atium was relatively unimportant. Vin couldn't explain why she felt he was so wrong in this regard. The atium was important. She just knew it. Her earlier despair lightened as she looked over the map. They had to go to Fadrex. She knew it.
    The answers would be there.
    "Taking Fadrex won't be easy," Elend noted. "Cett's enemies have entrenched themselves quite solidly there. I hear a former Ministry obligator is in charge."
    "The atium will be worth it," Vin said.
    "If it's there," Elend said.
    She gave him a flat stare.
    He