The Dugu Family boasted a family secret technique, the ability to craft a Soul Condensing Sword.
The Soul Sword could sever the souls of others as well as one's own, and it was with her soul as the blade that Dugu Nian sliced away half of her own soul, allowing Fang Lin's spirit to reside within her body.
"Grasping your beloved's soul, life intertwined with yours!"
Such an act caused immense damage to Dugu Nian. A spiritual injury of such magnitude was extraordinary, yet Dugu Nian did not hesitate for a moment. She made the cut with resolute determination, a testament to how much she cared for Fang Lin.
Even if all that remained of Fang Lin was a single wisp of his soul, Dugu Nian was determined to preserve it, to prevent it from dissipating into the heavens and earth. She was willing to pay any price to do so.
