Hjaðningavíg, the legend of Heðinn and Hǫgni or the Saga of Hild is a Germanic heroic legend about a never-ending battle which is documented in Sörla þáttr, Ragnarsdrápa, Gesta Danorum, Skíðaríma and in Skáldskaparmál. It is also held to appear on the image stone at Stora Hammar on Gotland. Moreover, it is alluded to in the Old English poems Deor and Widsið, and in the Old Norse Háttalykill inn forni, and a version of it survived down to the 18th century in the traditional Norn language ballad "Hildina". An altered version of the saga is found in the Middle High German poem Kudrun, as a prologue to the story of Kudrun herself. Yet another version is found in the Old Yiddish Dukus Horant.

Germanic heroic legend is the heroic literary tradition of the Germanic-speaking peoples, most of which originates or is set in the Migration Period. Stories from this time period, to which others were added later, were transmitted orally, traveled widely among the Germanic speaking peoples, and were known in many variants. These legends typically reworked historical events or personages in the manner of oral poetry, forming a heroic age. Heroes in these legends often display a heroic ethos emphasizing honor, glory, and loyalty above other concerns. Like Germanic mythology, heroic legend is a genre of Germanic folklore.