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

Jiang Ming was amused and did not know whether to laugh or cry. He quickly corrected the elven-eared old man in front of him. "You're wrong. That's not what you said. You should be truthful."

This was the first time the elven-eared old man had been reprimanded like this. His face turned red. "What nonsense are you talking about? What I said is completely right!"

After the elven-eared old man said this, Jiang Ming finally understood the elven-eared old man's personality. He said to the old man with the huge beard, "If this envoy of the mystic realm can't be cured, you guys will suffer too."

These words hit the heart of the old man with the huge beard.

As the envoys of the mystic realm, they were previously imprisoned. If one of the three of them were injured, the other two could not escape and would lose a portion of their lifespan.

Three Old Men