User blog comment:SayuriDarling/The Sword of Summer Official Discussion/@comment-27026561-20150928121418

The sword  of  summer was made  by Volund the son of Ivaldi and foster father of Frey. When Loki made a bet with the dwarves Brokk and Sindri which said that they could make better weapon than the sons Ivaldi they did it and won it whithout the sons of Ivaldi knowing. Odin killed Ivaldi therefore Egil Volund and Slagfin decided to avenge him and take a revenge on the gods who humiliated them. The sword first purpose was made to kill giants then He changed the purpose of the sword and it was made to kill any enemy of the clan of Ivaldi. No one could use it but a member of the clan. Svipdag used it to avenge his mother s death and rape. He was Volund s nephew and Egil s son. He rescued Freyja from the giants and married her. He gave the sword to Frey as a sign of reconciliation. Since he married Freyja Frey was therefore a member of his clan. But he got it back after Frey s wedding with Gerd. He s also known as Od the lost god or Hermod the traveler. The sword was also known as the sword of victory and revenge its name is Gambantein. Ivaldi is an elf and his sons are half elves half giants. Their mother is Greip and their step sisters are Fenja and Menja. They are giantesses. They ve got other sisters from their father s side: Idun Sif and others I think.