Crystal Strider
CREATURE 10Each long, thin leg of a crystal strider is a single enormous crystal, typically quartz or selenite. The strider uses this panoply of legs and a fluctuating physical structure to rapidly move about crystalline caverns, unimpeded by terrain.
The vast ranks of earth elementals have been slow to respond to the return of the elemental lords and the Planes of Metal and Wood. These events have not broken the mountains, nor have they blown away the sands.
Earthy Emotions
Earth elementals talk even less than most elementals. They're ponderous, weighing decisions so slowly they can crush the energy from a discussion. Their foremost concern is whether a situation can be endured. Though a rare or resplendent treasure might entice an earth elemental, it's difficult to spur any sense of urgency in them without the presence of an immediate threat.
Tremorsense allows a monster to feel the vibrations through a solid surface caused by movement. It is an imprecise sense with a limited range (listed in the ability). Tremorsense functions only if the monster is on the same surface as the subject, and only if the subject is moving along (or burrowing through) the surface.
The crystal strider's many narrow legs allow it to ignore difficult terrain.
The strider emits the light that continually refracts within them to cast Chromatic Ray as an innate primal spell heightened to 5th rank, with a +21 spell attack roll. The crystal strider can't Release Light again for 1d4 rounds.
Large or smaller, leg, DC 29 basic Reflex
The monster Strides up to double its Speed and can move through the spaces of creatures of the listed size, Trampling each creature whose space it enters. The monster can attempt to Trample the same creature only once in a single use of Trample. The monster deals the damage of the listed Strike, but trampled creatures can attempt a basic Reflex save at the listed DC (no damage on a critical success, half damage on a success, double damage on a critical failure).