So It Turns Out I'm the Only One Cultivating Immortality?

Xiang Feng traveled through time and became a disciple of an immortal cultivator, and received the immortal cultivator's inheritance. Before his death, his master said: "There are immortal cultivators everywhere under the mountain. It is too dangerous. Unless you are a true immortal cultivator, you are not allowed to go down the mountain." Xiang Feng was convinced. "Ding, congratulations to the host. After practicing for ten years, you will be rewarded with the entry level of immortal cultivation and become the only immortal cultivator in this world." "..." I believe you, you are such a bad old man. It turns out that I am the only one in this world who is cultivating immortality——! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.