A card back, in the style of [gothic], featuring [arched shapes], [deep red], [dark gray], and [stylized bats]. drawn all the way to the edges with no background visible. the card back should have a unique design, with elements of symmetry and repetition, flat with no shadow, no script, vertical symmetry, while still maintaining a cohesive look and feel. the overall design should evoke a sense of [spooky mystery], sophistication, and [gothic elegance], the final product should be high-quality, vector artwork, suitable for printing on the backs of standard playing cards.