Push (Ex)
Source: Advanced Player's Guide, p. 61
An eidolon gains the ability to push creatures away with a successful attack. Select one type of natural attack. Whenever the eidolon makes a successful attack of the selected type, it can attempt a free combat maneuver check. If successful, the target of the attack is pushed 5 feet directly away from the eidolon. This ability only works on creatures of a size equal to or smaller than the eidolon. Creatures pushed in this way do not provoke attacks of opportunity. This evolution can be selected more than once. Its effects do not stack. Each time an eidolon selects this evolution, it applies to a different natural attack.