Malevolent Femcantation

Curse-Warding Magic: Malevolent Femcantation (呪符魔法『邪心女呪音』) is a Curse-Warding Magic spell.

Description
The user sacrifices three powerful mages of the same sex to create a bridge between the underworld and the living world, enabling a devil to completely manifest itself. After the first sacrifice, the devil is able to share half of its host's body. Because the devil is physically manifested in the host's body, the host is more difficult to kill, requiring either Arcane or Saint Stage magic.

After the second sacrifice, the devil is able to partially manifest itself out of the host's body. As a result, the devil's power is far more potent.