How can the Vinculum be broken? Does it fade?
As a rule, the Vinculum does not fade. In fact, a vinculum can last hundreds of years. (Guide to the Sabbat, pg.156) Yet, Blood and magic sometimes do inexplicable things. Vaulderies sometimes lower a Vinculum instead of raising it. Sometimes, just sometimes, if a vampire fails to partake of the Vaulderie for an extended period of time, the power of the vinculum weakens.(Guide to the Sabbat, pg.203) There are rumors of Sabbat leaders who know of rituals that can break the bonds of the Vaulderies.