Attack of the Giant Leeches is better than critical consensus gives it credit for. The locale and the monsters (concept more than execution, mind you) create an effective atmosphere; I'd love to see this one remade.
I'm not quite sure who's the demonic beast in this one. The lady pulling on the centaur's mane, which he doesn't seem happy about, gets my vote, I'd say.
Remember the early Frankenstein movie poster where the Monster appears to be a giant and he has this death ray beam coming from one of his eyes? I wonder where the artist got the idea for this one.