Custom Blood Magic: Ritual
Some chronicles allow for their players to develop customized powers for their characters. The following is a compilation of player created custom content in OWBN. At this time, custom content that is created and/or used by vampire PC's is required to be listed.
You need a human skull, and at least bone craft for this ritual.
You write the agreement on the skull using bone craft (which may require a bodycrafts chop)
All parties spend a blood and a will. All parties must be willing.
Anyone breaking the agreement loses access to a will power a night, then a mental trait a night once all their will power is gone. When the target hits zero mentals they fall to torpor. The skull will visibly darken while this happens.
This fate can be avoided by either destroying the skull, or finding a way to 'fix' the agreement (which will not always be possible), at which point all lost traits return the following night.