Immortal, I Want to Become Stronger so Much

[Strong and refreshing writing, with detailed settings, the characters are not brainless, they do not overwhelm the combat power, they do not abuse the protagonist, and the plot is not aggrieved] Zhang Yan, who suffered from cancer in his previous life, traveled to the world of martial arts and gained the ability to recover quickly by consuming energy. And, as it becomes stronger, its self-healing ability becomes stronger and stronger. "The magic of disintegration of demons, start!" The tension of using the forbidden technique as a level A made me feel suffocated in my previous life, but in my new life, I just want to gratify and pursue my inner happiness, and then become stronger and stronger until the end.