"We can't stop it! The only thing hard enough to penetrate it is... itself..."
— Mr. Incredible, The Incredibles
"[N]uclear power can be conquered only by more nuclear power."
"Send a maniac to catch one."
—John Spartan, Demolition Man
"Only a Worldkiller can defeat another Worldkiller. Why continue a fight you cannot win?"
— Reign, Last Daughter of Krypton