Psionic powers spring from sentient minds. Even an undead creature or a being that has no physical form can create a reserve of inner strength necessary to manifest powers, as long as it has an Intelligence score of at least 1. Vermin possessed of a hive mind ability are an exception to this rule.
A power is manifested when a
psionic character pays its
power point cost. Some
psionic creatures automatically manifest powers, called psi-like abilities, without paying a
power point cost. Other creatures pay
power points to manifest their powers, just as characters do.