Call of the Myriad Swords, Roar of the Dragons; this phenomenon was a manifestation of Sword Heart realm. Upon reaching such a level of mastery in swordsmanship, one's sword would be granted spirit, allowing one to wield it as though it was one's own limbs. To a master swordsman, this enhanced level of control could easily translate into a twofold increase in fighting prowess.
Those who had achieved this realm were already qualified to establish their own sects and start their own lineage of swordsmanship.
In fact, most of the current sect leaders and emperors in the world hadn't even reached such a level yet. Just which of the duo in the mist was the one who had reached this astounding level of mastery, causing the innumerable swords out here to bow down to him?
And who was the one filling the entire stage with sword qi, leaving the crowd below with goosebumps?