The price of magic

He made it with straw from the fallen leaves of an ancient tree and sweat from a towel of the guy that lies to him. 

A scar on his face from a fight when he was a kid scared people away but he learned to be nice from his grandmother like he learned about magic. 

A drop of blood on a new moon on the doll soaked in the water where the towel was. Dried and then left outside to dry until the next new moon. 

Then the pricks and pains started, he never used this but he lied so he deserved it nothing drastic but enough pain just for fun.  

Until every pain caused to the doll doubled coming back to the wizard. The magic had its price and every prick took a toll on their body starting with the nails. In a week they fell off then the hair. 

And every pain caused to the doll doubled every week for the wizard until they got rid of the cool and never used it again.