When mental ability had been trained to an extreme, the heart would be as firm as a rock. Even if there were a thousand, or tens of thousands of illusions, one would not be entranced by them. One flying dagger would point straight towards the actual body and behead the enemy!
And when the perception of the seven apertures of the human head were trained to an extreme, the seven apertures would be opened and the entire world would be in your perception. There would be no secrets, no door to heaven, nor crack to the underground, that an enemy could take refuge in!
Of course, who knew how many years it would take to practice the “Moonshatter Flying Daggers” to an extreme level, and how many years it would take to reach an extreme level in the four accompanying abilities.