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 disappointed. They were all beginner-level spells.

He could practice them when he had time. However, they were not of much use.

Jiang Ming suddenly stopped on a Jade slip.

He had finally found something good.

"The Fire Metal Sword Technique mobilizes the spiritual energy of both metal and fire attributes at the same time, erupting powerfully. It is almost invincible among beginner spells. However, this technique has a huge flaw. Because it combines the two most violent spiritual energies of the five elements, it is easy to damage the spiritual core during the practice process. The stronger the cultivation, the greater the damage."

This technique could be of use to Jiang Ming. After all, he would not be affected by its drawback,

"However, this technique also consumes a lot of spiritual energy. I can't use it several times in a row."

In any case, Jiang Ming finally had a truly powerful technique.

Forbidden Immortal Cultivation Technique (2)