Bogus is a euphemism and I feel the need to remind everyone of this: Desktop Dungeons is a primarily a puzzle game wherein victory is earned through calculation and the cunning combination of documented game elements. Where there are gambles, the odds are known. Where there is blackspace, there is predictability; the risk-taking is fair because the unknown can be extrapolated from what has already been uncovered. Which is why giving dungeon bosses powerful hidden abilities alongside normally displayed statuses is not only a cause of unfair frustration, but wildly out of context for the game experience as a whole. I would strongly suggest that such bosses be given unique status icons that, if not practically able to fully describe their powers, would at least serve as a warning or reminder that not all is as standard in their case.
Or, as a brief tldr transcription of my initial reaction, asdfasdcasdfacewcarcasdfasdfgbf,mgmghgfhk;gfhk;.