"And this faith had been strengthened when a year or so ago a medicine man had dug up Ezinma's iyi-uwa."
Medicine Man
Public DomainMedicine Man

The iyi-uwa is an object that is believed to be the connection between an ogbanje child and the world. If the iyi-uwa is found and destroyed, it will stop the ogbanje from returning. The iyi-uwa can be a stone, hair, dolls, and even omens. To find the iyi-uwa, a medicine man or shamen will question the living ogbanje to lead the way to the burried iyi-uwa.