Spirit Kingdom tells the story of two kingdoms at war. A living kingdom trying to protect their land, and a kingdom of spirits trying to take back the home that was once theirs. The art style is inspired by video games such as Cuphead, Bendy and the Ink Machine, and Hollow Knight. The cards capture a cute and cartoonish look which appeals to a wide demographic, with a darker tonality to evoke a mysterious feeling because of the darker story.