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In the martial arts that Zhou Heng had already mastered, none could compare with the Sword Technique of Conviction in terms of mystical effects.
Not a single one.
Even the fragment of the Purple Thunder Blade Skill, which was a third-rank heavenly skill, was merely an extremely powerful attack technique that did not truly touch upon the deep, fundamental principles of the Great Dao.
The Overturning Heaven Three Palms was in a similar situation.
Although this peerless skill was the foundation for the 'Overturning Sky Seal' with tremendous power, capable of even shattering heaven and earth at the highest levels of mastery, it was ultimately just a method of attack.
The strength of the Sword Technique of Conviction lay not only in its being a supreme sword technique but also in its supreme mystical utility; it involved the Dao of Time, inscrutable and profound, and could be called the peak of Absolute Fourth-Rank techniques.
