What Can I Exchange for Traveling Through Another World to Survive Three Days First?

Inexplicably, he traveled to a different world. Fortunately, he signed in for three days to get the Sharingan and Flame Dragon Armor. Let's see how Sun Qian plays in the world of immortality. Immortals, are they both sentimental and ruthless? (The logic should be as harmonious as possible, and there will be no leaks in the whole process. The villains all have brains and IQs, and will not pretend to be brainless or deliberately suppress the protagonist. I hope handsome and beautiful readers can give me some advice.)