The correct word is "magic."
"Magic" is a noun, and it refers to the use of supernatural powers or forces.
However, "magics" can be used in some specific contexts:
* In older literature: The word "magics" was sometimes used in older texts to refer to various magical arts or practices.
* Informal speech: In some informal situations, people might use "magics" as a slang term for magic.
It's always best to use the correct word "magic" in most situations.