Watch Cardfight!! Vanguard Season 1 Episode 21 Online
- COUNTRIES: Japan
- Subtitles: 日本語
Teams Q4 and AL4 gather at the Asteroid headquarters. Kai fights Ren in a decisive battle to protect Aichi. The battle begins between Kai, who denies the power of PSYqualia, and Ren, who is overflowing with that power.