Currently you are able to watch "Black Clover: Sword of the Wizard King" streaming on Netflix, Netflix basic with Ads.
When the villainous Conrad Leto threatens the Clover Kingdom by trying to resurrect the four exiled ancient Wizard Kings, Asta must step in. Asta was born with no magic, in a world where everything is magic. He attempts to prove his worth by becoming a Wizard King, and must fight against Conrad to protect the Clover Kingdom.
Black Clover: Sword of the Wizard King is an upcoming animated film based on the Japanese manga series by Yuki Tabata. Tabata serves as a chief supervisor and character designer for the film, which is produced by Studio Pierrot for Netflix. Ayataka Tanemura, who previously created the Black Clover television series, directs the film, with a screenplay from Johnny Onda and Ai Orii, and a score from Minako Seki.
Gakuto Jajiwara leads the voice cast as Asta, the boy born with no magic. Conrad Leto is voiced by Toshihiko Seki, with Mair Iitoyo as Milly Maxwell, Miyuki Sawashiro as Pincia Funnybunny, Nobunaga Shimazaki as Yuno and Junichi Suwabe as Yami Sukehrio.