Thanks a lot for giving the game a chance and your feedback! I appreciate the encouragement!
I'm sorry. I tried to convey the information to the player by animations. And cursed events are showing some kind of purple aura (the same animation for the last enemy's casting animation). But apparently this wasn't clear enough. This was a massive design flaw on my part for so many players to not figure out the clues.
Again, thank you and have a nice day!