"By my calculations, outside, it should have been..." He paused. "About two days? If the passage opened on schedule, Sarah and the others should have returned to the guild by now."
"And then?" A young demon hunter looked up and asked. His name was Jack Torrance, and his left arm was wrapped in bandages. "Will the guild send people to rescue us?"
"They will." Castiel answered with certainty. "But we need to be prepared. Purgatory's space is unstable. Even if a rescue team gets in, it'll be hard for them to find us. We need to... send a signal."
"With what?" Benny gave a bitter smile. "There are no electromagnetic waves here, no magical beacons. Even the most basic spatial anchor points are constantly drifting. I've tried everything."
"We have this." Castiel pulled something from his clothes.
It was his angel identification tag, an identity marker possessed by every official angel. It was palm-sized and dark gold, its surface engraved with complex Heavenly runes.
The tag itself had no communication function, but it possessed one characteristic: when other angel identification tags or Heavenly creations were nearby, it would produce a faint resonance.
"I've already sensed it," Castiel said. "There are no other angel identification tags in Purgatory, but our rescue team will definitely carry beacons supported by Heavenly technology—assuming there is a rescue team. As long as they enter a certain range, my tag will vibrate. Then we can actively send out energy pulses to guide them."
Jack Torrance's eyes lit up. "How large is the range?"
"I don't know," Castiel said honestly. "It depends on the beacon's power, as well as the degree of interference from Purgatory's environment. It could be five kilometers, or it could be only five hundred meters. And..." He looked toward the camp entrance, where