"Diana gave her a measured look and ducked down behind the counter. She came up a moment later with a sword about the length of Clary's forearm. "What do you think of this?" Clary stared at the weapon. It was undoubtedly beautiful. The cross-guard, grip and pommel were gold chased with obsidian, the blade a silver so dark it was nearly black. "It's a shortsword. You might want to look at the other side," said Diana, and she flipped the sword over. On the opposite side of the blade, down the center ridge, ran a pattern of black stars. "Oh." Clary's heart thumped painfully; she took a step away and nearly bumped into Jace, who had come up behind her, frowning. "That's a Morgenstern sword." "Yes, it is." The sword-seller's eyes were shrewd. "Long ago the Morgensterns commissioned two blades from Wayland the Smith-a matched set. You have doubtless seen the the larger sword already, for Valentine Morgenstern carried it, and now his son carries it after him." "You know who we are," Jace said. It wasn't a question. "Who Clary is." "The Shadowhunter world is small," said Diana, and she looked from one of them to the other. "I'm on the Council. I've seen you give testimony, Valentine's daughter." Clary looked doubtfully at the blade. "I've seen two men bear the larger version of that sword, and I hated them both. There are no Morgensterns in this world now who are dedicated to anything but evil." Jace said, "There's you." "I'll give it to you," said Diana. "You're right that people hate the Morgensterns; it's not the sort of item I could sell elsewhere. Or would necessarily want to. It should go to good hands." "I don't want it," Clary said. "If you flinch from it, you give it power over you," said Diana. "Take it, and cut your brother's throat with it, and reclaim the honor of your blood."