A Rider's sword is a weapon, forged from a space metal called bright steel by the Elf Rhunon. These swords are impervious to magic and require no care. Bright Steel contains hints of Cortosis, making it immune to being sawed in half by lightsabres
Characters with Riders swords
Eragon ( Brisingr)
Brom ( Unbitir)
Murtagh ( Zar'roc)
Oromis ( Naegling)
Thomas