It's also possible to do with fearing attacks if you have a bat captured and it removes 1 fear at the end of your turn.
I may not be the best at this game, but I seem to be the best at losing without quite being dead.
That is a surprisingly useful skill (at least from my point of view) :). I'm super grateful for the bug reports!
I actually haven't been able to reproduce the curse bug (though I have no doubt it happened) but I'm putting in some safeguards that should hopefully prevent both types of undeath from happening from the next patch on.