Battle Spirits
Top 10 in Top 10 Best Card Game Anime of All Time
Battle Spirits, a film by Akira Nishimori, is based on the Battle Spirits trading card game by Bandai. Dan Bashin, a little child, is brought to the fictional Grand Rolo realm by the two enigmatic Momose siblings, Yuuki and Kajitsu.
Dan quickly finds out that the reason he was selected as a core soldier is that he carries the red core's light. Dan decides to save Grand Rolo from the Otherworld King, who has been abusing them, along with the other soldiers. Fans of the game should watch this even though it pulls from genre clichés.
50 episodes
Watch here: https://battlespirits.com/