Creature Abilities
Source Alien Core pg. 208
The following creature abilities are listed here because they are shared by many creatures or are highly complex. The statistics for individual creatures might alter the traits, the number of actions, or other rules of these abilities. Anything noted in a specific creature's stat block overrides the general rules for the ability below. In these abilities, “monster” is used for the creature that has the ability, to differentiate it from any other creatures the ability might affect.
Frightful Presence
Source Alien Core pg. 209
(aura, emotion, fear, mental) A creature that first enters the area must attempt a Will save. Regardless of the result of the saving throw, the creature is temporarily immune to this monster's Frightful Presence for 1 minute.
Critical SuccessThe creature is unaffected by the presence.
SuccessThe creature is frightened 1.
FailureThe creature is frightened 2.
Critical FailureThe creature is frightened 4.