Volume 9: Phantom of the Ancient Castle Chapter 12: Entering the Path

Newman could feel the chilly aura from underground wandering dozens of meters below his feet.

Though he was not as adept at detecting magic power and spiritual sense as his two companions, he had many intricate props and instruments to compensate for this deficiency. This creature now seemed to have felt the formidable strength of the castle residents and was maybe worried about being captured and refined by the powerful beings there. So long as everyone had still been in Damarlinsk Castle, this cold presence remained dormant, and even Rebry and Mihailovich found it difficult to sense its existence. However, Newman, with the Exploration Soul Needle he had developed, could sense this creature lurking in the cold, dark depths below.

According to Newman's assessment, this creature should be hiding as deep as the Underground Fifth Level of the underground palace.