You briefly become one with zh’Taal Mord’Marr and gain knowledge of the surrounding territory. In caves and other natural underground settings, the spell gives you knowledge of the land within 3 miles of you. In the outdoors, above ground, the radius is limited to 300 feet. The spell doesn’t function where nature has been replaced by unnatural construction, such as in dungeons and towns.
You instantly gain knowledge of up to three facts of your choice about any of the following subjects as they relate to the area:
– terrain and bodies of water
– prevalent plants, minerals, animals, or peoples
– powerful aberrations, fey, fiends, elementals, or undead
– influence from other planes of existence
For example, you could determine the location of powerful undead in the area, the location of major sources of safe drinking water, and the fastest/best route to some destination (like the surface).
This spell is exactly the Commune with Nature spell with the underground and outdoors effects reversed.