I like the artwork, it's highly detailed and interesting. Black and white serves it well.
When making multi-panel artwork spread out over many cards, it's better to create at least a fine border around the edges of the artwork. When artwork on the faces is printed "into the bleed"/past the edge of the card, those edges can act as tell-tales to a card cheat, allowing them to identify the card in the pack from the edge. I've done this myself in the past!
Are you planning to launch on Kickstarter? Have you chosen a print company to do the work for you?