Spotted Leeches

The Madarite Leeches is a species of leeches that within less then a day lay their eggs in the bladder of living beings and die. The eggs then hatch immediately and death is then provoked by the terrible pain felt when the baby leeches come out at the same time as the urine. The eggs need a strong and stable concentration of ammoniac to hatch which luckily means that if the amount of ammoniac in the urine is to low the eggs evacuate and go out with the urine as they are without causing any pain. You can do this by drinking a lot of beer and peeing often and when your urine turns from black to white you are save.