So, I'm playing a warrior-type with Cornugon Smash, who gets to intimidate stuff when he wants to. The thing is, my DM keeps telling me that undead, animals, constructs, aberrations and almost anything is immune to being intimidating.
Am I missing something? Maybe he's thinking of the social usage of intimidate instead of the the fear effect? His argument is the Unnatural Presence trait, which says you can intimidate vermin and animals.
So, what exactly is immune to being demoralized and what isn't? This is frankly insanely confusing.
Mindless things are immune to intimidate. That includes a large number of undead and constructs. For the most part, animals and aberrations are not immune to intimidate. There is a thread here that discusses what are immune to fear and how the unnatural presence trait is pretty awful because it basically only gives you the ability to intimidate mindless vermin.