SFS Standard Shape Stone [two-actions] Spell 4

Traditions arcane, primal
Range touch
Targets cube of stone 10 feet across or smaller

Calling on your will and the powers of the earth, you shape the stone into a rough shape of your choice. The shaping process is too crude to produce intricate parts, fine details, moving pieces, or the like. Any creatures standing atop the stone when you reshape it must each attempt a Reflex save or Acrobatics check.
SuccessThe creature is unaffected.
FailureThe creature falls prone atop the stone.
Critical FailureThe creature falls off the stone (if applicable) and lands prone.