Curse of Decay

You put a magical symbol on the target(a dead body or living creature) , it can easily be seen, every minute the target is dealt 1d4 necrotic damage.(A dead body is slowly decomposed) large amounts of pain is felt though the entire process, once brought down to 0 hp the target is considered undead and stays conscious for the duration but fills no more pain. This can be reversed by restoring a hit point to the target before the spell ends. If the symbol is removed by pinching the skin where the symbol is placed(this is a free action) the spell ends. At the end of the duration the body decomposes if the target died.