Natural Law: A principle which governs the world apart from the will of any particular being.
There is no such thing as The Natural Law of Gravity. Gravity is an adverb that has been nouned. Newton did not answer the question “what makes stuff fall?” “Gravity” is a general word that embodies a description of how things seem to “fall” in a consistent manner.
There is no Natural Law governing anything, for there can be no action without a causal agent (thank you, Pasteur). To claim that “Natural Law” is the agent is nonsense: An action can not be its own cause.
“Natural Laws” are descriptions of what seem to be (to the best of our knowledge) consistent acts by a causal agent: They cannot be the agent itself. Thus, there is no such thing as a violation of Natural Law. The faeries just changed their minds.