Living Dead in dungeons is like those doors with obvious pull handles, but they are set up in such a way that requires, and ask the user to push to open. Which isn't good design, and I think requires further changes to improve usability. What could be neat is it reduces your HP to 1, and make you unkillable, and gives you a barrier equal to the amount of HP that you sacrificed, and then gives you some other effect if that barrier is broken.