silhouette of a steaming cauldron, bubbling with a mysterious potion, evoking themes of magic, witchcraft, and halloween

cauldron magic potion witchcraft halloween silhouette bubbling steaming mystery fantasy black brew enchantment spell witch wizardry sorcery occult spooky creepy gothic dark evil poison concoction elixir philter charm hex curse superstition folklore mythology legend icon symbol graphic illustration vector isolated simple flat design element celebration holiday autumn