I don't get it. I put my chief up by the door and it says she is pointing out a rare collectable. I know all about the collections and I only need a couple left to complete. What I don't get is, what am I suppose to see when they do it? Nobody runs over and picks up anything, I don't see anybody doing anything. How does this spell work, and what am I suppose do?

There is a very good discussion about the chief and collectibles here that should help you.