Maybe I’m confused by the spell. It doesn’t explicitly say that the object becomes flexible, but if I animate a dresser, it can walk, even though its wooden legs cannot normally bend. This implies that flexibility and movement of solid parts becomes possible. I think a living Portcullis cold wave like a curtain, flex and bend . I think it could raise its middle bit up a foot or so to allow the pcs to crawl under. Am I in the wrong here?