Stonespeaker

From publisher blurb:

The zwerc are a strange subtype of dwarf found in the Underworld, and while their collectives are often vastly different from one another a single fact unifies them all—each reveres stonespeakers, though legends tell of humans and other races assuming the powerful earthly mantle as well. These geomancers control the very rock around them, exploding earth under adversaries and transforming their very surroundings like a sculptor with clay. This brand new base class is designed for use in the endless caves of Aventyr, but is guaranteed to bring a rocking good time to any group playing the Pathfinder Roleplaying Game!