In the original story, after Han Lingsha becomes the host of the Wangshu Sword, anyone else who uses the weapon drains her physical energy, effectively treating her like a living power bank until she runs out of juice.
With Mufeng, however, things work differently. When other people use the Wangshu Sword, it always boils down to a contest for control, with whoever has higher spiritual power holding the advantage.
In the original story, Han Lingsha was just starting her cultivation, so naturally she could not control the Wangshu Sword and was constantly drained of her essence, breath, and spirit.
Chapter 210