Fire

Although there's several advanced magical fire, but it's extremely easy for a wizard to conjure a normal type of fire to burn or warm up something. There's three known type of magical fire in Wizarding World: Incendio (can be put out easily), Fiendfyre (cursed fire, dark magic), Gubraithian Fire (everlasting fire, the only known producer of this fire in the world was Albus Dumbledore).