 The "Prose Edda" also states that three gods killed Ymir; the brothers Odin, Vili and Vé, and details that, upon Ymir's death, his blood caused an immense flood.Scholars have debated as to what extent Snorri's account of Ymir is an attempt to synthesize a coherent narrative for the purpose of the "Prose Edda" and to what extent Snorri drew from traditional material outside of the corpus that he cites.By way of historical linguistics and comparative mythology, scholars have linked Ymir to Tuisto, the Proto-Germanic being attested by Tacitus in his 1st century AD work "Germania" and have identified Ymir as an echo of a primordial being reconstructed in Proto-Indo-European mythology.