From publisher blurb:
The ancient lands of the desert are rife with aged ruins guarded by stony sentinels from bygone days, whose implacable gaze can still the heart of a miscreant or scare off a would-be tomb robber. The ancient race of sphinxes is said to have endowed the first living monoliths with their powers, raising statues to a semblance of life, but today, most of these paragons of justice are mortals who willingly take on the mantle of immortal warriors through ritual and devotion, imbuing themselves with the patience and eternal strength of stone.
Prestige Class: Living Monolith
Role: Living monoliths are resolute guardians, able to defend weaker party members, as would an ancient tomb. Their ability to increase in size makes them able to keep many attackers at bay.