Hate Child

The Hate Child is the Organization's secret and final weapon. An object/person of extreme power, the hate child is only to be released in the case of the Organization's utter collapse. When released, it would destroy anything left of the Organization.

The hate child seems to be at least 300 years old and quite formidable as Blanc admits that with all his power, he was unsure if he could actually beat it.

The hate child is kept in Staff.

Evidence seems to suggest that the hate child is the combination of Priscilla/Destroyer (as seen in the original manga)