What If Your Antagonist Isn’t Human – What’s The Secret Sauce Then?

In my last post, I looked at the secret sauce you need to make antagonists menacing. Today I want to go beyond basics with non-human antagonists. In school, we all likely learned the different types of conflict in literature:

human vs human (very common, no examples needed)
human vs himself (Hamlet, The Tell-Tale Heart, A Walk To Remember)
human vs nature (Lost in the Barrens, The Perfect Storm)
human vs supernatural (anything with vampires, werewolves, witches, demons, zombies, etc.)
human...