Detector

“Well, well,” the ancient creature said. “My foresight does not seem so foolish now, does it, Captain? The powers of Threnody wish to join the main stage. Engage the device.”

Kelsier had an immediate sinking feeling. Whatever that device did, he suspected it would not go well for him. He turned to bolt down the corridor, making for one of the windows. Behind him, the powerful golden light of the gemstone faded.

Kelsier felt nothing.

“Well,” the captain said from behind, voice echoing. “Nobody from Threnody within a day’s march of here. Looks like a false alarm after all.”

Mistborn: Secret History Part 5 Chapter 2