First came across a Rusalka in Quest For Glory IV. That series always had really cool lore references
I never could get the 4th game in the series to work
It has some of the most hilarious bugs of all time. Especially the one where the timer until the final boss kills you keeps running during his death animation. If it runs out he'll immediately resurrect and kill you.
And the best part is that the animation is based on real-time, but the death timer is clock cycles! By the time the game released, there were already computer with fast enough processors to make it impossible!
It's playable now with DosBox, as long as you're willing to accept a crash every 15-30 minutes. It's worth it though, since it's the best game in the series, even with the bugs.