Spoiler Alert: This article/section contains details about future plotlines described in the light novels, not covered in the anime. Do not proceed unless you want to be spoiled.
Night Vision ( is an Illusion-element ナイトビション , Naito Bishon ) ? spell in ALfheim Online.
Once the incantation is complete, the caster's raised hand send out a wave of gray light that spreads in all directions. Any players covered in the light are granted night vision and become able to see in a wide area around them in the dark.
. 我らは得る、夜を照らす眼 ( オース・ナーザ・ノート・ライサ・アウガ )
Give us eyes that illuminate the night.
Volume 3, Chapter 4
Fairy Dance Manga Stage.004
Kirito chanted the spell to allow him and Leafa to see in the dark while travelling through the Legrue Corridor.
Volume 7, Chapter 5
Nori used the spell to provide her party with night vision while they were navigating the Labyrinth of the 27.
↑ The name of the spell in Kirito's "The spelling list of magic" window in episode 19.
2.0 2.1 2.2 2.3 2.4 Words of Power and katakana provided in Kirito's "The spelling list of magic" window in episode 19.
↑ SAO no Subete.
4.0 4.1 4.2 4.3 4.4 Romanization of the katakana provided in the manga and the anime.
↑ Translation of the kanji.