Is Cultivating Immortality so Simple?

When I first got the immortal cultivation technique Mu Xingchen: Is it difficult to cultivate immortality? One year later… Looking at the golden elixir in his body, Mu Xingchen asked: Is cultivating an immortal so simple? Some years later... Ah, this, is this invincible? I'm afraid I'm not a fake immortal. Oh! It turns out I have a large size! That's okay! I am invincible, you can do whatever you want!