Not sure if they fixed it to avoid scamming, but if you enter the lumredge swamp with a candle and no tinderbox box, the candle goes out im pretty sure you start to die.
Complete barrows, and stay there. The falling rocks will kill you.
That place with the dust devils near poleyvinch? enter without a mask and you will slowly die (need a quest though)
This method would be luck. By a bunch of kebabs in Alkard for like 3gp per. Most of them will heal you but an occasiaonal few will take off hp. I doubt your going to get more damaged ones than ones that heal though.