Alanna of Trebond and Olau's Sword Lightning
Lightning is doubled edged like a broadsword, but is said to be much lighter. The hilt is studded with gems and topped with a crystal. Said to be a relic of the Old Ones, Lightning also has mysterious magical properties. These magical properties are first shown when the sword saves Alanna from death.
Alanna: The First Adventure (First Appearance)
Tamora Pierce
Alysia Derry-Chavez
Image Source URL: http://static.tvtropes.org/pmwiki/pub/images/518W7A1ZWDL.jpg
Novel
Eragon's Sword Brisingr
Brisingr, meaning fire in the Ancient language, was created by Rhunön and is a hand-and-a-half (or bastard) sword. Brisingr had a leaf-shaped steel cap on the end of a dark blue scabbard and it had a lighter iridescent blue blade. There was also a large blue sapphire in the pommel of the blade. Whenever Eragon said the blade’s name the sword would burst into blue flame.
Brisingr (First Appearance)
Christopher Paolini
Alysia Derry-Chavez
Image Source URL: http://fc05.deviantart.net/fs70/f/2011/024/9/4/items_of_alagaesia_by_corellastudios-d37xg3x.jpg
Novel