Vast Sky Drizzle

When Jiang Ming woke up in a strange world, he learned he had obtained immortality. In the dangerous and ruthless world of cultivation, he was determined to carve his unique path. Taking advantage of his immortality, he vowed to learn forbidden skills that would normally eat away at the user’s life. 
As he continued on his path, Jiang Ming realized that with his forbidden skills, he could become the strongest. 

As An Immortal, I Only Learn Forbidden Skills

CatABoo

"It is a snatching technique. It snatches one's vital Qi."

Jiang Ming recalled the records on the animal skin.

This was a ruthless and overbearing auxiliary cultivation technique. The user could seize the vital Qi of others. Once a martial artist ran out of vital Qi, they would not be far from death.

After snatching this vital Qi, one could refine it into their own vitality and integrate it into their body. Which would greatly increase one's cultivation speed.

In fact, if they continued to use the Vitality-Snatching Technique to assist their cultivation, they would no longer have any bottlenecks in martial arts and would be able to become a Grandmaster.

In addition, the stronger the target of the Vitality-Snatching Technique, the more profound the vital Qi would be seized, and the faster the cultivation speed of the user would be.

Incredible Speed