The 2018 anime series for Cardfight!! Vanguard began airing back in the Spring 2018 season but the English dub is now available to view over on Amazon for Prime Video viewers.
Plot Synopsis via Amazon:
The main protagonist, Aichi Sendou, is a timid and mundane third-year middle schooler. The thing that supported Aichi’s heart, was the “Blaster Blade” card that he received as a child. From the day he reunited with the person who gave him that card, Toshiki Kai, Aichi’s life began to change. It’s a youthful story of Vanguard cardfighters who clash passionately with each other through fights.
You can watch the original Japanese audio with English subtitles version over on Crunchyroll and Bushiroad’s official YouTube channel dedicated to the franchise (the dub is also streaming on there as well).