Icy Spirit

Jiang Chen had studied the Icy Heart Formula. He had regarded it as a challenge and intended to crack its side effects.

The result was disappointing; he couldn't crack it, because the Icy Heart Formula wasn't meant to be practiced by human beings. It was the Icy Spirit's method.

The Icy Spirit was a prehistoric species. Although they looked similar to human beings, they had a mysterious power that enabled them to develop rapidly, like monsters, so they were seen as nobler than human beings.

In short, human beings couldn't control the Icy Heart Formula. If they forced themselves to practice it, they would be controlled by it in the end.

Jiang Chen had released his research results to the public in his previous life in the hopes that people wouldn't practice it blindly, because its practitioners would not only change into completely different people, but would stop feeling completely!