The Crystal Cave in the Site of the Significance Overlaps Reality

The true seeing spell or potion allows a character to see and interact with both dimensions. Cavern in the site is significant overlap between characters' reality and similar, true seeing characters are being escorted by Droh Pariahs who immediately guide them to the other chamber. Crystals are not of this world. Alien of the Habsens is an anathema to the matter of the prime plane. If someone enters the chamber, the souls of their feet begin to dissolve. The same thing happens to anyone who climbs the walls and any rope lower down.