The characteristic of the Darkness Dao is its unknown, mysterious, and elusive nature.
Practitioners of such Dao are difficult to lock down or trap, making them the prime choice for stealth and espionage.
But darkness itself can be contained by space.
During the heyday of the Darkness Demon Lord, Alkaid's Heavenly Capital Dragon Slaying Formation and the Heaven-Sealing Stele were unable to do anything to him - at most, they could only detect his position with the illumination of the True Spirit's Light and launch a limited counterattack.
However, as the Demon Lord's Heavenly Demon Origin was gradually eroded away by the Great Annihilation Sword Qi's Great Path of Destruction, the power he could summon from the Darkness Dao also declined to its limit, and now, he was finally subdued by the Heaven-Sealing Stele.
Moreover, unlike those who mastered powerful offensive Dao techniques of the Shattered Void and Refining Void, the Darkness Dao was not adept at breaching defenses.
