That was the supreme sword intent taught by the Xuantian goddess to Mr. Yuan back in the day. Although not named a heavenly scripture, it indeed possessed the essence of one, historically the general outline of swordsmanship transmitted only within the lineage of the sect masters!
In that year, the founder of the Xuantian swords wielded this technique alone, broke through formations single-handedly, slaughtered the Shijue Sacred Teachings, severed the lineage of demon gods north of Mount Mang, massacred the heavenly demons, and vanquished the three elders and four ancestors of Emei, rightfully the number one person under the heavens!
Unfortunately, as the founder of the Xuantian swords disappeared, this technique had long been lost. I've only heard the Chunjun Sword boasting about how extremely powerful it was, yet I've never seen it myself..."