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's just like how you had lived for three thousand years before you could appreciate how beautiful your hometown was. If I had only lived for a single day, I'm afraid I would not have been able to experience everything in my life that made me happy!"

Dr. Sun laughed bitterly and shook his head. He said faintly, "Three thousand years ago, I had the same thought. Why did the fire mayflies only live for a day? Could they have lived longer if they didn't consume the miasma?"

The evening sun passed through the thick miasma and shone on Dr. Sun's body. However, his body became colder and colder, as if he could not feel the warmth of the sun at all. Hair had grown all over his arms as they turned into two slender insect legs. Two huge translucent wings slowly spread out behind him.

His turbid eyes seemed to have become more yellow, and crystal antennae grew on his forehead.

Three Thousand Years and One Day (3)