The Legend of Sigurd and Gudrún claims that he desires only to avenge his father. The gold and the glory, he adds, are for Sigurd to keep. Twice Regin attempts to forge a sword for Sigurd, only to see the latter effortlessly break them. At last, Sigurd goes to his mother Sigrlinn and requests the broken pieces of Grímnir. Regin takes these and forges the sword Gram. Although Sigurd wishes to slay Fafnir then and there, Regin tells him he must have a horse. In response, Sigurd buys the horse Grani, who was sired by Odin's eight-legged steed Sleipnir, and goes forth to kill Fafnir. Later,
Legged robot Legged robot Legged robots are a type of mobile robot which use mechanical limbs for movement. They are more versatile than wheeled robots and can traverse many different terrains, though these advantages require increased complexity and power consumption. Legged robots often imitate legged animals, such as humans or insects, in an example of biomimicry. Legged robots can be categorized by the number of limbs they use, which determines gaits available. Many-legged robots tend to be more stable, while fewer legs lends itself to greater maneuverability. One-legged, or pogo stick robots use a hopping motion for navigation. In the 1980s, Carnegie