Vaulderie

Vaulderie is a blood rite practised by the Sabbat to bond pack members together. Each member of the pack mixes a small amount of each member's Vitae in a cup; a ritual is performed, then each pack member drinks from the cup.

This mixing and drinking of multiple vampire's blood causes a communal, weak blood bond called the vinculum. It generally makes pack members supportive of and loyal to each other, though it does not produce the extreme reactions of a full bond.