Vampires.

In 2ed, there were entirely different statistics for vampires of different races (for example, dwarven vampires didn't care about sunlight or wooden stakes, couldn't shapeshift or cross a line of powdered metal, and could be defeated by sticking a stone spear through their hearts), and vampires gained powers as they aged, until a vampire who had been undead for at least a thousand years was only annoyed by sunlight, could telepathically dominate people who weren't meeting their gaze, and drained five levels on hit.