Another commenter noted also that this shouldn't be a bluff. Here's an example of the kind of thing that could be helpful: "I love working here and I can really see continuing my career here for a long time. So I'm really hoping we can come to an agreement so that this makes sense."

This gets them thinking about you as a market participant and not about how small a raise they can give you. Even if you don't have active offers, understanding your value in the market is really important.