Medium-size Earth Elementals are 8 feet high and weigh
Earth elementals speak Terran but rarely choose to do so.
Elemental: Immune to poison, sleep, paralysis, and stunning.
Not subject to critical hits.
Earth Mastery (Ex): An earth elemental gains a +1 attack and
damage bonus if both it and its foe touch the ground. If an
opponent is airborne or waterborne, the elemental suffers a -4
penalty to attack and damage. (These modifiers are not included
in the statistics block.)
Push (Ex): An earth elemental can start a bull rush maneuver
without provoking an attack of opportunity. The combat modifiers
given in Earth Mastery, above, also apply to the elemental's
opposed Strength checks.