This crime was supposedly done every year around Easter to ensure the perpetrators' return to the Holy Land.
One instance of this action was reportedly carried out by a landlord from Zverki, an event later described in an 1844 book by Vladimir Dal. The location of yearly occurrences of this action was claimed to be decided by an international council in Narbonne. Simon of Trent's participation in one of these actions was depicted on a bridge in Frankfurt along with people suckling from a sow. Fear over accusations of performing this action was the basis for exemptions from the ritual use of red wine. Gabriel of (*) Białystok ("byah-wee-stalk") and William of Norwich were canonized for being victims of this crime. This crime was supposedly done every year around Easter to ensure the perpetrators' return to the Holy Land. For 10 points, identify this false accusation commonly made against medieval Jews that claimed they killed Christian children for a certain bodily fluid.
One instance of this action was reportedly carried out by a landlord from Zverki, an event later described in an 1844 book by Vladimir Dal.
blood libel (prompt on murder, child murder, kidnapping children, consuming blood, and similar descriptive answers)