Human: Is Gandalf hypothetically a formidable foe for Charmed's Barbas? Assistant: 
No, Gandalf is a fictional character created by J. R. R. Tolkien. Gandalf was a wizard in the Hobbit and Lord of the Rings series. Gandalf used his staff to cast powerful spells. Barbas was a demon on Charmed that had resistance to magic, so Gandalf is not hypothetically a formidable foe.