create a spooky halloween vibe with a sepia palette, ghost figurine, and dark branches for a chic decor banner

spooky halloween vibe sepia palette ghost figurine dark branches chic decor banner scary october frightening creepy witch haunted mysterious skeleton pumpkin fall autumn spider web moon bats cat cobwebs spells moonlight shadows phantom night ghoul graveyard black orange candles witchcraft themed eerie dusk scarecrow spirit costume raven supernatural ai generated