The term "witch's brew" typically refers to a magical concoction made by a witch, often used for spell-casting or other supernatural purposes. However, there are many synonyms for this phrase, each offering a unique take on the idea of a mystical potion. Some alternatives include "mystic potion," "enchantress elixir," "sorceress' serum," "magic mixture," "soul potion," "elixir of dreams," "wizard's wonder," and "shaman's tonic." Each of these phrases evokes a different image or idea, but they all convey the same sense of powerful mysticism and otherworldly energy. Whether you're writing a fantasy story or just looking for a more evocative term, these synonyms can help add depth and intrigue to your work.