This is just a fun prop. It changes the character's face and the mood of the drawing to a playing card style. It doesn't respond well to various facial expressions (especially open-mouthed faces).
Trigger : flat coloring, black eyes, pcard_eyes, pcard_nose, pcard_lips, white_skin
additional tag : pcard_face, line art, curl hair, mustache, beard
(optional) pking_face, pjack_face, pqueen_face