yfirmorðinginn ‘the chief murderer’: Lit. ‘over-murderer’. The epithet could refer either to Lucifer or to Judas. Skj B and other eds understand it as a reference to Lucifer, while Kock (NN §1525) and this edn think it refers to Judas. The designation yfir- as well as the context suggest that the point is that Lucifer is the true villain and Judas is his pawn.