The Brotherhood (The Brotherhood #3)

A new message from X: "Genetic testing in schools to ferret out those young men and women who may be mutants? This will prove to be your greatest mistake. Already, you have pushed one more to us. His powers have manifested, and he will return your prejudice in kind. You have been warned. To the demagogue Ludlum: continue to spew your racist rhetoric at your own risk. For every word you utter, we will take action. For every anti-mutant phrase that you speak, another human will pay the ultimate price."