Creatures Creature Families Creature Abilities
Creature Adjustments Creature Templates

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.

Swarm Mind

Source Alien Core pg. 210
This monster doesn't have a single mind (typically because it's a swarm of smaller creatures) and is immune to mental effects that target only a specific number of creatures. It's still subject to mental effects that affect all creatures in an area.