This rune was commonplace in the past but its secrets had been lost to the centuries. However, Dwarf adventurers in Karak Azgal discovered several axes bearing the rune and carried one to Karaz-a-Karak where it came into the possession of the Master Runesmith, Kragg the Grim. By dint of long study, Kragg came to understand the secrets of the rune and how to inscribe it. The jealous old Runelord might have kept the secret to himself but, knowing that other Runesmiths were probably studying it, elected to share the knowledge and thereby gained the credit for deciphering the secret.