Ep. 21: Abyss of Darkness
Ipinalabas noong Setyembre 21, 2018
Team Q4 and Team AL4 gather at the Asteroid headquarters. Toshiki Kai fights Ren Suzugamori in a decisive battle to protect Aichi Sendou. The battle begins between Kai, who deems the power of PSYqualia as being false strength, and Ren, who is overflowing with that power. (Source: Cardfight!! Vanguard Wikia)