In Norse mythology
was a son of Hreidmar
and brother of Regin
. After Otter was killed by the Aesir
, Hreidmar received the cursed gold
's as repayment for the loss of his son. Fafnir and Regin then killed their father to get the gold, but Fafnir decided he wanted it all, turning into a dragon
(symbol of greed). Regin then sent his foster-son, Sigurd
, to kill the dragon. Sigurd succeeded, but then killed Regin too, upon learning that he had planned to kill him once he had recovered the gold.
As Fafner, he featured in Wagner's Der Ring des Nibelungen.