Sword Art Online S4E20: The Night-Sky Blade
- Aired: 2020-08-29
- Time: 01:00:00
- Runtime: 25 minutes
Overview
Alice and Asuna head to the World's End Altar as Kirito confronts Gabriel. Unless he can defeat Gabriel and return to the real world before the maximum-acceleration phase begins, Kirito will have to spend the next 200 years in the Underworld.