This was definitely a spot of interest, but Caiaphas wasn't sure if they should keep going, or stop to try and check it out. After a moment, he sat down on the ledge they using to find the ruined house, and just watched the spells. The entrance had to be purely mechanical, otherwise the spells would be swarming around it, trying to feed on it. He suspected even a non-detection spell wouldn't work, as they were drawn by magic.