Necromancy (Ancient Greek νεκρός (nekrós) "dead body" and μαντεία (manteía) "prophecy or divination") is a magical practice involving the communication with the deceased – either by summoning their spirit as an apparition or raising them bodily – for the purpose of divination, imparting the means to foretell future events or discover hidden knowledge, to bring someone back from the dead, or to use the deceased as a weapon, as the term may sometimes be used in a more general sense to refer to black magic or witchcraft.
During our tête-à-tête with Claude Florentine in the Mausoleum, the sorceror demands we hand him the 
Shrive. Our refusing recusancy is retaliated by his demonstration of an act of necromancy. Apparently in conjunction with his walking stick, the head's cane fittingly features a small skull, he summons three 
Skeletons from the bone-scattered grounds.
Florentine - the Summoning