Question: Who allied with the Pecheneg prince who appears as a villain in a 2006 Russian traditionally-animated feature film loosely based on the story of prince Vladimir the Fair Sun?
Sentence (from "Kurya (khan)"): According to the "Chronicle of Bygone Years", Kurya had Svyatoslav's skull made into a goblet (a known practice in Eurasian nomadic cultures for brave foes), and gilded.
Relevant evidence: No