Tyrfing

Tyrfing as the coat of arms of Bolmsö parish
Svafrlami secures the sword Tyrfing.

Tyrfing, also rendered as Tirfing or Tyrving, was a magic sword in Norse mythology, which features in the Tyrfing Cycle, which includes a poem from the Poetic Edda called Hervararkviða, and the Hervarar saga. The name is also used in the saga to denote the Goths.