He died a painfull way after giving birth, tortured SA attempt hungry in a cold prison, he burnt his last soul power sending power to his baby, giving up reincarnation (because he is afraid ML will harm the baby, ML call the baby a bas****) and then digged out himself his heart (to make elexir for the empress) in exchange that the ML spare the baby and then turning into ashes. But of course ML find a way to resurrect MC and they end up together after up and down 140000 years later