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I decided to send not only my Lesser Spirits, which only can remain here for at most an hour, but also some of my permanent ones, including my Dragon Spirits resting within my Dragon Heart. They were all the Souls of the Dragons we defeated in the dwarf mountain, which allied me after I gave them a second chance as Dragon Spirits. Their eggs still being incubated within the Fairy Queendom. I don't know when they'll hatch though, but whenever they do, I might tame these dragons with my new Divine Skill and add them to my Divine Beast Familiar List.
While we made our way back to the house of the four researchers, and well, the fifth addition that was resting there, my spirits approached the ruins, led by the Dragon Spirits. I told them to use their special Spirit Senses to look for any anomaly, such as Miasma, Nether, or Demonic Energies, which were very easy to detect by Spirits most of the time.