A striking split-face portrait, with the left side meticulously detailed as Batman and the right side eerily transformed into the Joker. The division is a perfect, straight line that bisects the center of the face from forehead to chin, creating a dramatic visual contrast. On the Batman side, the iconic cowl covers the forehead, with pointed ears extending above the line. The eye on this side is a sleek, black slit, piercing the darkness and revealing the intense determination of the Caped Crusader. The skin is a blend of shadowy blues and blacks, with a stern jawline and a firm, unsmiling mouth. The profile of the left side is angular and stoic, embodying the brooding essence of the vigilante. On the Joker's side, a ghastly white face with a permanent, maniacal grin is smeared with crimson lipstick, creating a chilling rictus that curves upwards into his cheek. The eye is a vivid shade of emerald green, surrounded by a chaotic maelstrom of black and purple, reflecting the madness within. His hair is a wild, neon green that stands out against the stark white skin, and a scarlet chuckle extends from the corner of his mouth to his ear, a twisted mirror of the smile painted onto his face. The right side of the portrait is a whirlwind of chaos and color, with a mischievous glint in the Joker's eye that seems to dance with insanity. The two halves come together to form a single face that captures the epic struggle between order and anarchy, heroism and villainy, in the eternal dance of Gotham's most infamous adversaries. The starkness of the split emphasizes the stark differences between the Dark Knight and the Clown Prince of Crime, yet the shared humanity beneath their masks is unmistakable, inviting viewers to ponder the fine line between good and evil.