Hello, while my playrun I start to see that my own tower start healing creep.
I was thinking that I couldn't win and then i try to understand.
In fact, when you're using knusperhexe you're decreasing the armor to a negative ammount.
And so the dried cactus (who penetrate +15% armor), stacking at X% (maybe 100) makes your tower to deal negative ammount of dommage to the opposant.
I don't really know what kind of bugs makes it but I thought it should be good to warn :)
I've also had this happen. It's definitely some interaction with the Knusperhexe, but interestingly it's not a 100% of the time thing... except against bosses/challenges, where it seems to be much more reliable for some reason. "Fixed" it in my save by building over my Knusperhexe. I wonder if it would be possible to trigger this bug with towers other than Mr Iron?