Halloween Watercolor Cards Spooky Art

Create spooky Halloween greeting cards with one prompt. Large watercolor illustration fills lower half, misty upper area for your text. Dark palette: violet, orange, black, green. Replace [THEME]: jack-o'-lantern, cauldron, ghost, black cat, haunted house, scarecrow, candy bucket, full moon, potion. ✅ Empty space for custom text ✅ Loose watercolor, no hard edges ✅ No text in image ✅ Works with Gemini / Flow