Lambent Light

«Lambent Light» is a one-handed rapier owned by Asuna. Asuna's degree of her proficiency with her sword is one thousand (mastered). Her rapier, combined with her speed, earned her the nickname «The Flash». Lisbeth boosted her weapon to +40. It is her end weapon used until the clearing of SAO.

Sword Art Online
It is first named in the side story Warmth of the Heart, as a work done by Lisbeth, who stated it was of a quality she could only forge once a month.