"We actually found a way to save Astrid, but we need your help. Find us in the part of the Labyrinth where it snows." Tyler used the Labyrinth Communication Charm he had acquired from the Room of Fortune to send a message to Lutz. The charm only worked inside the Labyrinth; the receiver didn't need any device to receive the message. The sender just needed to think about the person inside the Labyrinth.
An hour later, Tyler White, little Mathilda, and Lily Gomes found Lutz waiting for them outside.
"As expected, you seem to have some sort of map of the Labyrinth," Tyler said, noticing how easily Lutz had found them.
"No, it's more like a compass for the Labyrinth. It points to where the abnormal weather is," Lutz explained, tossing a compass to Tyler.