Witch's Brew Ingredient is a term used to describe the ingredients used in a magical potion. The two most common ingredients are NEWT and TOAD, both of which have four letters. NEWT is a small amphibian that lives in water and is often used in potions for its healing properties. TOAD is a type of amphibian that is often used in potions for its magical properties. Both NEWT and TOAD are important ingredients in Witch's Brews and are essential for creating powerful potions.