Xuanhuan: I, who amend without limit, will be arbitrary forever!

Gu Yang traveled to the fantasy world and obtained the modified production date system.
Since then, Gu Yang has embarked on the road of unlimited modification.
[You will modify your cultivation to hundreds of millions of years later, become a breakthrough immortal emperor limit, and reach the realm of the eternal Taoist ancestor! 】
[You modified the exercises hundreds of millions of years later, and successfully comprehended the Supreme Sword Sutra, which can reversibly cut time and space, and fate. 】
[You modified the bloodline of the beast pet white fox to hundreds of millions of years ago, and successfully awakened the bloodline of the ancient nine-tailed sky fox! 】
…… ...