Doku's father banish his mother while she was carrying him in her belly. She was banish because she made his army try to invade and kill his brother because she wanted her king to have more power. When he found out he had her followers executed and banish her to the desert. She walk for months through the sand after she find out she was pregnant then the time came for the baby to be born. A bad sand storm made her had birth in a snake den. These was not regular snake but snake warriors. The queen came to the mother to kill her for being in her den. She was able to talk to snakes so the queen didn't kill her but due to be in a desert for so long she die giving birth. Before she died she ask the queen to rise her son and have him to kill his father. The queen accepted the son and rise him to hardness the poison control jutsu. She name the son Doku Hebi(Poison Snake) and when he got older he led her army to destroy his father kingdom. He took his zanpakuto and kill his father with Zabimaru his zanpakuto first release form. The king ask him who was he while the poison was killing him slowly "I am your son." The king die with the look of shock still on his face. When the kingdom finally burn down Doku left the snake den. He told the queen he wanted more power and she was to weak to train him anymore. The queen try to kill Doku but he cut her down with ease and kill the rest of her clan. Doku became a drifter hoping to find a way to become stronger so he can be king of everything................