sentences:  He proved himself at any rate an ardent opponent of Arianism, stood for the Nicean creed at the Council of Rimini, and refused to enter into ecclesiastical intercourse with the Arian bishops Ursacius of Singidunum and Valens of Mursa.He took, in fact, the extreme view, in common with Bishop Lucifer of Calaris (Cagliari), that it was unlawful to make advances to bishops or priests who at any time had been associated with Arianism, or to hold any religious communion with them.This Luciferian party found adherents in Spain, and on the death of Lucifer (370 or 371) Gregory of Elvira became the head and front of the movement.