Riðill (sometimes anglicised to Rithill or Ridill) or Refil is a sword that appears in

Norse Mythology Norse, Nordic, or Scandinavian mythology, is the body of myths belonging to the North Germanic peoples, stemming from Old Norse religion and continuing after the Christianization of Scandinavia as the Nordic folklore of the modern period. The ...

, possessed by the dwarf

Regin In Norse mythology, Reginn (; often anglicized as Regin or Regan) is a son of Hreiðmarr and the foster father of Sigurð. His brothers are Fáfnir and Ótr. Attestations Völsunga saga When Loki mistakenly kills Ótr, Hreiðmarr demands to ...

. Under the guidance of Regin,

Sigurd Sigurd ( ) or Siegfried (Middle High German: ''Sîvrit'') is a legendary hero of Germanic heroic legend, who killed a dragon — known in Nordic tradition as Fafnir () — and who was later murdered. In the Nordic countries, he is referred t ...

killed

Fáfnir In Germanic heroic legend and Germanic folklore, folklore, Fáfnir is a Germanic dragon, worm or dragon slain by a member of the Völsung family, typically Sigurð. In Nordic mythology, he is the son of Hreiðmarr, and brother of Regin and Ótr ...

, Regin's older brother that had killed their father

Hreiðmarr In Norse mythology, Hreiðmarr (Old Norse: ; anglicized as Hreidmar) is a dwarf. He is featured in the ''Völsunga saga'' and in Snorri Sturluson's ''Prose Edda''. Hreiðmarr was the father of Regin, Fafnir, Ótr, Lyngheiðr and Lofnheiðr. He ow ...

and monopolized his treasure. Afterward, Fafnir's heart was cut out and roasted for Sigurd and Regin to eat. According to

Poetic Edda The ''Poetic Edda'' is the modern name for an untitled collection of Old Norse anonymous narrative poems in alliterative verse. It is distinct from the closely related ''Prose Edda'', although both works are seminal to the study of Old Norse ...

, Regin used Riðill to cut out Fafnir's heart. But in the Volsunga saga, it is Sigurd who used Riðill and cut out the heart at that occasion.Byock, Jesse L. ''Saga of the Volsungs''. University of california Press, 1990, p. 65 In ''

Skáldskaparmál ''Skáldskaparmál'' (Old Norse: 'Poetic Diction' or 'The Language of Poetry'; ; ) is the second part of the ''Prose Edda'', compiled by Snorri Sturluson. It consists of a dialogue between Ægir, the divine personification of the sea, and Bra ...

'', the name of Regin's sword is Refil.

References

Medieval European swords Mythological Norse weapons Mythological swords Viking swords {{Norse-myth-stub