Playing a Pathfinder Infiltrator Ranger. What kind of action does it take to activate the Infiltrator Ranger power for this archetype during combat?
Adaptation (Ex): At 3rd level, an infiltrator learns how to copy the unusual abilities of his prey. He chooses one type of creature he has selected as a favored enemy, such as “aberrations.” The Ranger selects one ability or feat from the adaptation list for that type (see below). A Ranger can use adaptations for 10 minutes per day per Ranger level he possesses. This duration does not need to be consecutive, but it must be used in 10-minute increments. If the adaptation requires the Ranger to make a more specific choice (such as what skill to use with Skill Focus), this choice is permanent and cannot be changed.
Best Answer
The Adaption class feature is labelled as an extraordinary (Ex) ability. The rules have this to say about (Ex) abilities.
Well, now we know it is either free or a standard action. It's a little muddy because this is an (Ex) ability that grants a second ability, but I'd lean towards saying it's not an action to use.
Reactive or not, the rules state that (Ex) do not usually require an action to activate; that gives guidance in cases where the action isn't specified. I wouldn't hold it against a DM who ruled otherwise, though.